mirror of https://github.com/go-gorm/gorm.git
672 lines
20 KiB
Go
672 lines
20 KiB
Go
package gorm
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import (
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"database/sql"
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"database/sql/driver"
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"fmt"
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"reflect"
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"regexp"
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"strconv"
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"strings"
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)
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func (scope *Scope) primaryCondition(value interface{}) string {
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return fmt.Sprintf("(%v = %v)", scope.Quote(scope.PrimaryKey()), value)
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}
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func (scope *Scope) buildWhereCondition(clause map[string]interface{}) (str string) {
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switch value := clause["query"].(type) {
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case string:
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// if string is number
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if regexp.MustCompile("^\\s*\\d+\\s*$").MatchString(value) {
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return scope.primaryCondition(scope.AddToVars(value))
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} else if value != "" {
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str = fmt.Sprintf("(%v)", value)
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}
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case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, sql.NullInt64:
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return scope.primaryCondition(scope.AddToVars(value))
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case []int, []int8, []int16, []int32, []int64, []uint, []uint8, []uint16, []uint32, []uint64, []string, []interface{}:
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str = fmt.Sprintf("(%v in (?))", scope.Quote(scope.PrimaryKey()))
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clause["args"] = []interface{}{value}
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case map[string]interface{}:
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var sqls []string
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for key, value := range value {
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sqls = append(sqls, fmt.Sprintf("(%v = %v)", scope.Quote(key), scope.AddToVars(value)))
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}
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return strings.Join(sqls, " AND ")
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case interface{}:
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var sqls []string
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for _, field := range scope.New(value).Fields() {
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if !field.IsIgnored && !field.IsBlank {
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sqls = append(sqls, fmt.Sprintf("(%v = %v)", scope.Quote(field.DBName), scope.AddToVars(field.Field.Interface())))
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}
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}
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return strings.Join(sqls, " AND ")
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}
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args := clause["args"].([]interface{})
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for _, arg := range args {
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switch reflect.ValueOf(arg).Kind() {
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case reflect.Slice: // For where("id in (?)", []int64{1,2})
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if bytes, ok := arg.([]byte); ok {
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str = strings.Replace(str, "?", scope.AddToVars(bytes), 1)
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} else {
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values := reflect.ValueOf(arg)
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var tempMarks []string
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for i := 0; i < values.Len(); i++ {
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tempMarks = append(tempMarks, scope.AddToVars(values.Index(i).Interface()))
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}
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str = strings.Replace(str, "?", strings.Join(tempMarks, ","), 1)
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}
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default:
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if valuer, ok := interface{}(arg).(driver.Valuer); ok {
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arg, _ = valuer.Value()
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}
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str = strings.Replace(str, "?", scope.AddToVars(arg), 1)
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}
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}
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return
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}
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func (scope *Scope) buildNotCondition(clause map[string]interface{}) (str string) {
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var notEqualSql string
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var primaryKey = scope.PrimaryKey()
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switch value := clause["query"].(type) {
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case string:
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// is number
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if regexp.MustCompile("^\\s*\\d+\\s*$").MatchString(value) {
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id, _ := strconv.Atoi(value)
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return fmt.Sprintf("(%v <> %v)", scope.Quote(primaryKey), id)
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} else if regexp.MustCompile("(?i) (=|<>|>|<|LIKE|IS) ").MatchString(value) {
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str = fmt.Sprintf(" NOT (%v) ", value)
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notEqualSql = fmt.Sprintf("NOT (%v)", value)
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} else {
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str = fmt.Sprintf("(%v NOT IN (?))", scope.Quote(value))
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notEqualSql = fmt.Sprintf("(%v <> ?)", scope.Quote(value))
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}
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case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, sql.NullInt64:
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return fmt.Sprintf("(%v <> %v)", scope.Quote(primaryKey), value)
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case []int, []int8, []int16, []int32, []int64, []uint, []uint8, []uint16, []uint32, []uint64, []string:
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if reflect.ValueOf(value).Len() > 0 {
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str = fmt.Sprintf("(%v NOT IN (?))", scope.Quote(primaryKey))
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clause["args"] = []interface{}{value}
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}
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return ""
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case map[string]interface{}:
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var sqls []string
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for key, value := range value {
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sqls = append(sqls, fmt.Sprintf("(%v <> %v)", scope.Quote(key), scope.AddToVars(value)))
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}
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return strings.Join(sqls, " AND ")
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case interface{}:
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var sqls []string
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for _, field := range scope.New(value).Fields() {
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if !field.IsBlank {
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sqls = append(sqls, fmt.Sprintf("(%v <> %v)", scope.Quote(field.DBName), scope.AddToVars(field.Field.Interface())))
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}
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}
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return strings.Join(sqls, " AND ")
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}
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args := clause["args"].([]interface{})
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for _, arg := range args {
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switch reflect.ValueOf(arg).Kind() {
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case reflect.Slice: // For where("id in (?)", []int64{1,2})
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values := reflect.ValueOf(arg)
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var tempMarks []string
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for i := 0; i < values.Len(); i++ {
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tempMarks = append(tempMarks, scope.AddToVars(values.Index(i).Interface()))
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}
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str = strings.Replace(str, "?", strings.Join(tempMarks, ","), 1)
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default:
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if scanner, ok := interface{}(arg).(driver.Valuer); ok {
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arg, _ = scanner.Value()
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}
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str = strings.Replace(notEqualSql, "?", scope.AddToVars(arg), 1)
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}
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}
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return
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}
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func (scope *Scope) buildSelectQuery(clause map[string]interface{}) (str string) {
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switch value := clause["query"].(type) {
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case string:
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str = value
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case []string:
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str = strings.Join(value, ", ")
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}
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args := clause["args"].([]interface{})
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for _, arg := range args {
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switch reflect.ValueOf(arg).Kind() {
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case reflect.Slice:
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values := reflect.ValueOf(arg)
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var tempMarks []string
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for i := 0; i < values.Len(); i++ {
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tempMarks = append(tempMarks, scope.AddToVars(values.Index(i).Interface()))
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}
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str = strings.Replace(str, "?", strings.Join(tempMarks, ","), 1)
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default:
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if valuer, ok := interface{}(arg).(driver.Valuer); ok {
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arg, _ = valuer.Value()
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}
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str = strings.Replace(str, "?", scope.AddToVars(arg), 1)
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}
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}
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return
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}
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func (scope *Scope) whereSql() (sql string) {
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var (
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quotedTableName = scope.QuotedTableName()
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primaryConditions, andConditions, orConditions []string
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)
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if !scope.Search.Unscoped && scope.HasColumn("deleted_at") {
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sql := fmt.Sprintf("%v.deleted_at IS NULL", quotedTableName)
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primaryConditions = append(primaryConditions, sql)
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}
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if !scope.PrimaryKeyZero() {
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for _, field := range scope.PrimaryFields() {
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sql := fmt.Sprintf("%v.%v = %v", quotedTableName, scope.Quote(field.DBName), scope.AddToVars(field.Field.Interface()))
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primaryConditions = append(primaryConditions, sql)
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}
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}
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for _, clause := range scope.Search.whereConditions {
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if sql := scope.buildWhereCondition(clause); sql != "" {
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andConditions = append(andConditions, sql)
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}
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}
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for _, clause := range scope.Search.orConditions {
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if sql := scope.buildWhereCondition(clause); sql != "" {
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orConditions = append(orConditions, sql)
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}
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}
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for _, clause := range scope.Search.notConditions {
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if sql := scope.buildNotCondition(clause); sql != "" {
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andConditions = append(andConditions, sql)
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}
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}
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orSql := strings.Join(orConditions, " OR ")
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combinedSql := strings.Join(andConditions, " AND ")
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if len(combinedSql) > 0 {
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if len(orSql) > 0 {
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combinedSql = combinedSql + " OR " + orSql
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}
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} else {
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combinedSql = orSql
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}
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if len(primaryConditions) > 0 {
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sql = "WHERE " + strings.Join(primaryConditions, " AND ")
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if len(combinedSql) > 0 {
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sql = sql + " AND (" + combinedSql + ")"
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}
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} else if len(combinedSql) > 0 {
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sql = "WHERE " + combinedSql
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}
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return
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}
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var hasCountRegexp = regexp.MustCompile(`(?i)count\(.+\)`)
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func (scope *Scope) selectSql() string {
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if len(scope.Search.selects) == 0 {
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if scope.Search.joins != "" {
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return fmt.Sprintf("%v.*", scope.QuotedTableName())
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}
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return "*"
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}
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sql := scope.buildSelectQuery(scope.Search.selects)
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scope.Search.countingQuery = (len(scope.Search.group) == 0) && hasCountRegexp.MatchString(sql)
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return sql
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}
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func (scope *Scope) orderSql() string {
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if len(scope.Search.orders) == 0 || scope.Search.countingQuery {
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return ""
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}
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return " ORDER BY " + strings.Join(scope.Search.orders, ",")
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}
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func (scope *Scope) limitSql() string {
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if !scope.Dialect().HasTop() {
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if len(scope.Search.limit) == 0 {
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return ""
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}
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return " LIMIT " + scope.Search.limit
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}
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return ""
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}
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func (scope *Scope) topSql() string {
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if scope.Dialect().HasTop() && len(scope.Search.offset) == 0 {
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if len(scope.Search.limit) == 0 {
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return ""
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}
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return " TOP(" + scope.Search.limit + ")"
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}
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return ""
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}
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func (scope *Scope) offsetSql() string {
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if len(scope.Search.offset) == 0 {
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return ""
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}
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if scope.Dialect().HasTop() {
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sql := " OFFSET " + scope.Search.offset + " ROW "
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if len(scope.Search.limit) > 0 {
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sql += "FETCH NEXT " + scope.Search.limit + " ROWS ONLY"
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}
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return sql
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}
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return " OFFSET " + scope.Search.offset
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}
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func (scope *Scope) groupSql() string {
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if len(scope.Search.group) == 0 {
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return ""
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}
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return " GROUP BY " + scope.Search.group
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}
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func (scope *Scope) havingSql() string {
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if scope.Search.havingConditions == nil {
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return ""
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}
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var andConditions []string
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for _, clause := range scope.Search.havingConditions {
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if sql := scope.buildWhereCondition(clause); sql != "" {
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andConditions = append(andConditions, sql)
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}
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}
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combinedSql := strings.Join(andConditions, " AND ")
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if len(combinedSql) == 0 {
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return ""
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}
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return " HAVING " + combinedSql
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}
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func (scope *Scope) joinsSql() string {
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return scope.Search.joins + " "
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}
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func (scope *Scope) prepareQuerySql() {
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if scope.Search.raw {
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scope.Raw(strings.TrimSuffix(strings.TrimPrefix(scope.CombinedConditionSql(), " WHERE ("), ")"))
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} else {
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scope.Raw(fmt.Sprintf("SELECT %v %v FROM %v %v", scope.topSql(), scope.selectSql(), scope.QuotedTableName(), scope.CombinedConditionSql()))
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}
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return
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}
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func (scope *Scope) inlineCondition(values ...interface{}) *Scope {
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if len(values) > 0 {
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scope.Search.Where(values[0], values[1:]...)
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}
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return scope
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}
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func (scope *Scope) callCallbacks(funcs []*func(s *Scope)) *Scope {
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for _, f := range funcs {
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(*f)(scope)
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if scope.skipLeft {
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break
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}
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}
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return scope
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}
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func (scope *Scope) updatedAttrsWithValues(values map[string]interface{}, ignoreProtectedAttrs bool) (results map[string]interface{}, hasUpdate bool) {
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if !scope.IndirectValue().CanAddr() {
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return values, true
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}
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var hasExpr bool
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for key, value := range values {
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if field, ok := scope.FieldByName(key); ok && field.Field.IsValid() {
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if !reflect.DeepEqual(field.Field, reflect.ValueOf(value)) {
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if _, ok := value.(*expr); ok {
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hasExpr = true
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} else if !equalAsString(field.Field.Interface(), value) {
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hasUpdate = true
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field.Set(value)
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}
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}
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}
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}
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if hasExpr {
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var updateMap = map[string]interface{}{}
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for key, field := range scope.Fields() {
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if field.IsNormal {
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if v, ok := values[key]; ok {
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updateMap[key] = v
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} else {
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updateMap[key] = field.Field.Interface()
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}
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}
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}
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return updateMap, true
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}
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return
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}
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func (scope *Scope) row() *sql.Row {
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defer scope.Trace(NowFunc())
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scope.callCallbacks(scope.db.parent.callback.rowQueries)
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scope.prepareQuerySql()
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return scope.SqlDB().QueryRow(scope.Sql, scope.SqlVars...)
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}
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func (scope *Scope) rows() (*sql.Rows, error) {
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defer scope.Trace(NowFunc())
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scope.callCallbacks(scope.db.parent.callback.rowQueries)
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scope.prepareQuerySql()
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return scope.SqlDB().Query(scope.Sql, scope.SqlVars...)
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}
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func (scope *Scope) initialize() *Scope {
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for _, clause := range scope.Search.whereConditions {
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scope.updatedAttrsWithValues(convertInterfaceToMap(clause["query"]), false)
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}
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scope.updatedAttrsWithValues(convertInterfaceToMap(scope.Search.initAttrs), false)
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scope.updatedAttrsWithValues(convertInterfaceToMap(scope.Search.assignAttrs), false)
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return scope
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}
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func (scope *Scope) pluck(column string, value interface{}) *Scope {
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dest := reflect.Indirect(reflect.ValueOf(value))
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scope.Search.Select(column)
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if dest.Kind() != reflect.Slice {
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scope.Err(fmt.Errorf("results should be a slice, not %s", dest.Kind()))
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return scope
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}
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rows, err := scope.rows()
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if scope.Err(err) == nil {
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defer rows.Close()
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for rows.Next() {
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elem := reflect.New(dest.Type().Elem()).Interface()
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scope.Err(rows.Scan(elem))
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dest.Set(reflect.Append(dest, reflect.ValueOf(elem).Elem()))
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}
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}
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return scope
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}
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func (scope *Scope) count(value interface{}) *Scope {
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scope.Search.Select("count(*)")
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scope.Err(scope.row().Scan(value))
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return scope
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}
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func (scope *Scope) typeName() string {
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typ := scope.IndirectValue().Type()
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for typ.Kind() == reflect.Slice || typ.Kind() == reflect.Ptr {
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typ = typ.Elem()
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}
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return typ.Name()
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}
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func (scope *Scope) related(value interface{}, foreignKeys ...string) *Scope {
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toScope := scope.db.NewScope(value)
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fromFields := scope.Fields()
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toFields := toScope.Fields()
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for _, foreignKey := range append(foreignKeys, toScope.typeName()+"Id", scope.typeName()+"Id") {
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var fromField, toField *Field
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if field, ok := scope.FieldByName(foreignKey); ok {
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fromField = field
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} else {
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fromField = fromFields[ToDBName(foreignKey)]
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}
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if field, ok := toScope.FieldByName(foreignKey); ok {
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toField = field
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} else {
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toField = toFields[ToDBName(foreignKey)]
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}
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if fromField != nil {
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if relationship := fromField.Relationship; relationship != nil {
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if relationship.Kind == "many_to_many" {
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joinTableHandler := relationship.JoinTableHandler
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scope.Err(joinTableHandler.JoinWith(joinTableHandler, toScope.db, scope.Value).Find(value).Error)
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} else if relationship.Kind == "belongs_to" {
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query := toScope.db
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for idx, foreignKey := range relationship.ForeignDBNames {
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if field, ok := scope.FieldByName(foreignKey); ok {
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query = query.Where(fmt.Sprintf("%v = ?", scope.Quote(relationship.AssociationForeignDBNames[idx])), field.Field.Interface())
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}
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}
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scope.Err(query.Find(value).Error)
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} else if relationship.Kind == "has_many" || relationship.Kind == "has_one" {
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query := toScope.db
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for idx, foreignKey := range relationship.ForeignDBNames {
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if field, ok := scope.FieldByName(relationship.AssociationForeignDBNames[idx]); ok {
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query = query.Where(fmt.Sprintf("%v = ?", scope.Quote(foreignKey)), field.Field.Interface())
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}
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}
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if relationship.PolymorphicType != "" {
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query = query.Where(fmt.Sprintf("%v = ?", scope.Quote(relationship.PolymorphicDBName)), scope.TableName())
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}
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scope.Err(query.Find(value).Error)
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}
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} else {
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sql := fmt.Sprintf("%v = ?", scope.Quote(toScope.PrimaryKey()))
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scope.Err(toScope.db.Where(sql, fromField.Field.Interface()).Find(value).Error)
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}
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return scope
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} else if toField != nil {
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sql := fmt.Sprintf("%v = ?", scope.Quote(toField.DBName))
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scope.Err(toScope.db.Where(sql, scope.PrimaryKeyValue()).Find(value).Error)
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return scope
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}
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}
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scope.Err(fmt.Errorf("invalid association %v", foreignKeys))
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return scope
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}
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/**
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Return the table options string or an empty string if the table options does not exist
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*/
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func (scope *Scope) getTableOptions() string {
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tableOptions, ok := scope.Get("gorm:table_options")
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if !ok {
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return ""
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}
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return tableOptions.(string)
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}
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func (scope *Scope) createJoinTable(field *StructField) {
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if relationship := field.Relationship; relationship != nil && relationship.JoinTableHandler != nil {
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joinTableHandler := relationship.JoinTableHandler
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joinTable := joinTableHandler.Table(scope.db)
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if !scope.Dialect().HasTable(scope, joinTable) {
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toScope := &Scope{Value: reflect.New(field.Struct.Type).Interface()}
|
|
|
|
var sqlTypes, primaryKeys []string
|
|
for idx, fieldName := range relationship.ForeignFieldNames {
|
|
if field, ok := scope.Fields()[fieldName]; ok {
|
|
value := reflect.Indirect(reflect.New(field.Struct.Type))
|
|
primaryKeySqlType := field.TagSettings["TYPE"]
|
|
if primaryKeySqlType == "" {
|
|
primaryKeySqlType = scope.Dialect().SqlTag(value, 255, false)
|
|
}
|
|
sqlTypes = append(sqlTypes, scope.Quote(relationship.ForeignDBNames[idx])+" "+primaryKeySqlType)
|
|
primaryKeys = append(primaryKeys, scope.Quote(relationship.ForeignDBNames[idx]))
|
|
}
|
|
}
|
|
|
|
for idx, fieldName := range relationship.AssociationForeignFieldNames {
|
|
if field, ok := toScope.Fields()[fieldName]; ok {
|
|
value := reflect.Indirect(reflect.New(field.Struct.Type))
|
|
primaryKeySqlType := field.TagSettings["TYPE"]
|
|
if primaryKeySqlType == "" {
|
|
primaryKeySqlType = scope.Dialect().SqlTag(value, 255, false)
|
|
}
|
|
sqlTypes = append(sqlTypes, scope.Quote(relationship.AssociationForeignDBNames[idx])+" "+primaryKeySqlType)
|
|
primaryKeys = append(primaryKeys, scope.Quote(relationship.AssociationForeignDBNames[idx]))
|
|
}
|
|
}
|
|
|
|
scope.Err(scope.NewDB().Exec(fmt.Sprintf("CREATE TABLE %v (%v, PRIMARY KEY (%v)) %s", scope.Quote(joinTable), strings.Join(sqlTypes, ","), strings.Join(primaryKeys, ","), scope.getTableOptions())).Error)
|
|
}
|
|
scope.NewDB().Table(joinTable).AutoMigrate(joinTableHandler)
|
|
}
|
|
}
|
|
|
|
func (scope *Scope) createTable() *Scope {
|
|
var tags []string
|
|
var primaryKeys []string
|
|
var primaryKeyInColumnType bool = false
|
|
for _, field := range scope.GetStructFields() {
|
|
if field.IsNormal {
|
|
sqlTag := scope.generateSqlTag(field)
|
|
|
|
// Check if the primary key constraint was specified as
|
|
// part of the column type. If so, we can only support
|
|
// one column as the primary key.
|
|
if strings.Contains(strings.ToLower(sqlTag), "primary key") {
|
|
primaryKeyInColumnType = true
|
|
}
|
|
|
|
tags = append(tags, scope.Quote(field.DBName)+" "+sqlTag)
|
|
}
|
|
|
|
if field.IsPrimaryKey {
|
|
primaryKeys = append(primaryKeys, scope.Quote(field.DBName))
|
|
}
|
|
scope.createJoinTable(field)
|
|
}
|
|
|
|
var primaryKeyStr string
|
|
if len(primaryKeys) > 0 && !primaryKeyInColumnType {
|
|
primaryKeyStr = fmt.Sprintf(", PRIMARY KEY (%v)", strings.Join(primaryKeys, ","))
|
|
}
|
|
|
|
scope.Raw(fmt.Sprintf("CREATE TABLE %v (%v %v) %s", scope.QuotedTableName(), strings.Join(tags, ","), primaryKeyStr, scope.getTableOptions())).Exec()
|
|
|
|
scope.autoIndex()
|
|
return scope
|
|
}
|
|
|
|
func (scope *Scope) dropTable() *Scope {
|
|
scope.Raw(fmt.Sprintf("DROP TABLE %v", scope.QuotedTableName())).Exec()
|
|
return scope
|
|
}
|
|
|
|
func (scope *Scope) dropTableIfExists() *Scope {
|
|
if scope.Dialect().HasTable(scope, scope.TableName()) {
|
|
scope.dropTable()
|
|
}
|
|
return scope
|
|
}
|
|
|
|
func (scope *Scope) modifyColumn(column string, typ string) {
|
|
scope.Raw(fmt.Sprintf("ALTER TABLE %v MODIFY %v %v", scope.QuotedTableName(), scope.Quote(column), typ)).Exec()
|
|
}
|
|
|
|
func (scope *Scope) dropColumn(column string) {
|
|
scope.Raw(fmt.Sprintf("ALTER TABLE %v DROP COLUMN %v", scope.QuotedTableName(), scope.Quote(column))).Exec()
|
|
}
|
|
|
|
func (scope *Scope) addIndex(unique bool, indexName string, column ...string) {
|
|
if scope.Dialect().HasIndex(scope, scope.TableName(), indexName) {
|
|
return
|
|
}
|
|
|
|
var columns []string
|
|
for _, name := range column {
|
|
columns = append(columns, scope.QuoteIfPossible(name))
|
|
}
|
|
|
|
sqlCreate := "CREATE INDEX"
|
|
if unique {
|
|
sqlCreate = "CREATE UNIQUE INDEX"
|
|
}
|
|
|
|
scope.Raw(fmt.Sprintf("%s %v ON %v(%v) %v", sqlCreate, indexName, scope.QuotedTableName(), strings.Join(columns, ", "), scope.whereSql())).Exec()
|
|
}
|
|
|
|
func (scope *Scope) addForeignKey(field string, dest string, onDelete string, onUpdate string) {
|
|
var keyName = fmt.Sprintf("%s_%s_%s_foreign", scope.TableName(), field, dest)
|
|
keyName = regexp.MustCompile("(_*[^a-zA-Z]+_*|_+)").ReplaceAllString(keyName, "_")
|
|
var query = `ALTER TABLE %s ADD CONSTRAINT %s FOREIGN KEY (%s) REFERENCES %s ON DELETE %s ON UPDATE %s;`
|
|
scope.Raw(fmt.Sprintf(query, scope.QuotedTableName(), scope.QuoteIfPossible(keyName), scope.QuoteIfPossible(field), dest, onDelete, onUpdate)).Exec()
|
|
}
|
|
|
|
func (scope *Scope) removeIndex(indexName string) {
|
|
scope.Dialect().RemoveIndex(scope, indexName)
|
|
}
|
|
|
|
func (scope *Scope) autoMigrate() *Scope {
|
|
tableName := scope.TableName()
|
|
quotedTableName := scope.QuotedTableName()
|
|
|
|
if !scope.Dialect().HasTable(scope, tableName) {
|
|
scope.createTable()
|
|
} else {
|
|
for _, field := range scope.GetStructFields() {
|
|
if !scope.Dialect().HasColumn(scope, tableName, field.DBName) {
|
|
if field.IsNormal {
|
|
sqlTag := scope.generateSqlTag(field)
|
|
scope.Raw(fmt.Sprintf("ALTER TABLE %v ADD %v %v;", quotedTableName, scope.Quote(field.DBName), sqlTag)).Exec()
|
|
}
|
|
}
|
|
scope.createJoinTable(field)
|
|
}
|
|
scope.autoIndex()
|
|
}
|
|
return scope
|
|
}
|
|
|
|
func (scope *Scope) autoIndex() *Scope {
|
|
var indexes = map[string][]string{}
|
|
var uniqueIndexes = map[string][]string{}
|
|
|
|
for _, field := range scope.GetStructFields() {
|
|
if name, ok := field.TagSettings["INDEX"]; ok {
|
|
if name == "INDEX" {
|
|
name = fmt.Sprintf("idx_%v_%v", scope.TableName(), field.DBName)
|
|
}
|
|
indexes[name] = append(indexes[name], field.DBName)
|
|
}
|
|
|
|
if name, ok := field.TagSettings["UNIQUE_INDEX"]; ok {
|
|
if name == "UNIQUE_INDEX" {
|
|
name = fmt.Sprintf("uix_%v_%v", scope.TableName(), field.DBName)
|
|
}
|
|
uniqueIndexes[name] = append(uniqueIndexes[name], field.DBName)
|
|
}
|
|
}
|
|
|
|
for name, columns := range indexes {
|
|
scope.NewDB().Model(scope.Value).AddIndex(name, columns...)
|
|
}
|
|
|
|
for name, columns := range uniqueIndexes {
|
|
scope.NewDB().Model(scope.Value).AddUniqueIndex(name, columns...)
|
|
}
|
|
|
|
return scope
|
|
}
|