mirror of https://github.com/go-gorm/gorm.git
304 lines
9.4 KiB
Go
304 lines
9.4 KiB
Go
package callbacks
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import (
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"reflect"
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"sort"
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"gorm.io/gorm"
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"gorm.io/gorm/clause"
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"gorm.io/gorm/schema"
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"gorm.io/gorm/utils"
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)
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func SetupUpdateReflectValue(db *gorm.DB) {
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if db.Error == nil && db.Statement.Schema != nil {
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if !db.Statement.ReflectValue.CanAddr() || db.Statement.Model != db.Statement.Dest {
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db.Statement.ReflectValue = reflect.ValueOf(db.Statement.Model)
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for db.Statement.ReflectValue.Kind() == reflect.Ptr {
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db.Statement.ReflectValue = db.Statement.ReflectValue.Elem()
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}
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if dest, ok := db.Statement.Dest.(map[string]interface{}); ok {
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for _, rel := range db.Statement.Schema.Relationships.BelongsTo {
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if _, ok := dest[rel.Name]; ok {
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db.AddError(rel.Field.Set(db.Statement.Context, db.Statement.ReflectValue, dest[rel.Name]))
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}
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}
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}
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}
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}
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}
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// BeforeUpdate before update hooks
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func BeforeUpdate(db *gorm.DB) {
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if db.Error == nil && db.Statement.Schema != nil && !db.Statement.SkipHooks && (db.Statement.Schema.BeforeSave || db.Statement.Schema.BeforeUpdate) {
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callMethod(db, func(value interface{}, tx *gorm.DB) (called bool) {
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if db.Statement.Schema.BeforeSave {
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if i, ok := value.(BeforeSaveInterface); ok {
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called = true
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db.AddError(i.BeforeSave(tx))
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}
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}
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if db.Statement.Schema.BeforeUpdate {
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if i, ok := value.(BeforeUpdateInterface); ok {
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called = true
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db.AddError(i.BeforeUpdate(tx))
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}
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}
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return called
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})
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}
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}
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// Update update hook
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func Update(config *Config) func(db *gorm.DB) {
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supportReturning := utils.Contains(config.UpdateClauses, "RETURNING")
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return func(db *gorm.DB) {
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if db.Error != nil {
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return
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}
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if db.Statement.Schema != nil {
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for _, c := range db.Statement.Schema.UpdateClauses {
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db.Statement.AddClause(c)
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}
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}
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if db.Statement.SQL.Len() == 0 {
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db.Statement.SQL.Grow(180)
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db.Statement.AddClauseIfNotExists(clause.Update{})
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if _, ok := db.Statement.Clauses["SET"]; !ok {
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if set := ConvertToAssignments(db.Statement); len(set) != 0 {
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db.Statement.AddClause(set)
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} else {
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return
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}
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}
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db.Statement.Build(db.Statement.BuildClauses...)
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}
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checkMissingWhereConditions(db)
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if !db.DryRun && db.Error == nil {
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if ok, mode := hasReturning(db, supportReturning); ok {
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if rows, err := db.Statement.ConnPool.QueryContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...); db.AddError(err) == nil {
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dest := db.Statement.Dest
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db.Statement.Dest = db.Statement.ReflectValue.Addr().Interface()
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gorm.Scan(rows, db, mode)
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db.Statement.Dest = dest
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db.AddError(rows.Close())
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}
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} else {
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result, err := db.Statement.ConnPool.ExecContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
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if db.AddError(err) == nil {
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db.RowsAffected, _ = result.RowsAffected()
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}
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}
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}
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}
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}
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// AfterUpdate after update hooks
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func AfterUpdate(db *gorm.DB) {
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if db.Error == nil && db.Statement.Schema != nil && !db.Statement.SkipHooks && (db.Statement.Schema.AfterSave || db.Statement.Schema.AfterUpdate) {
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callMethod(db, func(value interface{}, tx *gorm.DB) (called bool) {
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if db.Statement.Schema.AfterUpdate {
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if i, ok := value.(AfterUpdateInterface); ok {
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called = true
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db.AddError(i.AfterUpdate(tx))
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}
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}
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if db.Statement.Schema.AfterSave {
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if i, ok := value.(AfterSaveInterface); ok {
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called = true
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db.AddError(i.AfterSave(tx))
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}
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}
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return called
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})
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}
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}
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// ConvertToAssignments convert to update assignments
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func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
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var (
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selectColumns, restricted = stmt.SelectAndOmitColumns(false, true)
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assignValue func(field *schema.Field, value interface{})
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)
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switch stmt.ReflectValue.Kind() {
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case reflect.Slice, reflect.Array:
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assignValue = func(field *schema.Field, value interface{}) {
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for i := 0; i < stmt.ReflectValue.Len(); i++ {
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if stmt.ReflectValue.CanAddr() {
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field.Set(stmt.Context, stmt.ReflectValue.Index(i), value)
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}
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}
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}
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case reflect.Struct:
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assignValue = func(field *schema.Field, value interface{}) {
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if stmt.ReflectValue.CanAddr() {
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field.Set(stmt.Context, stmt.ReflectValue, value)
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}
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}
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default:
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assignValue = func(field *schema.Field, value interface{}) {
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}
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}
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updatingValue := reflect.ValueOf(stmt.Dest)
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for updatingValue.Kind() == reflect.Ptr {
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updatingValue = updatingValue.Elem()
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}
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if !updatingValue.CanAddr() || stmt.Dest != stmt.Model {
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switch stmt.ReflectValue.Kind() {
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case reflect.Slice, reflect.Array:
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if size := stmt.ReflectValue.Len(); size > 0 {
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var isZero bool
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for i := 0; i < size; i++ {
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for _, field := range stmt.Schema.PrimaryFields {
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_, isZero = field.ValueOf(stmt.Context, stmt.ReflectValue.Index(i))
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if !isZero {
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break
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}
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}
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}
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if !isZero {
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_, primaryValues := schema.GetIdentityFieldValuesMap(stmt.Context, stmt.ReflectValue, stmt.Schema.PrimaryFields)
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column, values := schema.ToQueryValues("", stmt.Schema.PrimaryFieldDBNames, primaryValues)
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stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.IN{Column: column, Values: values}}})
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}
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}
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case reflect.Struct:
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for _, field := range stmt.Schema.PrimaryFields {
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if value, isZero := field.ValueOf(stmt.Context, stmt.ReflectValue); !isZero {
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stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.Eq{Column: field.DBName, Value: value}}})
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}
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}
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}
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}
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switch value := updatingValue.Interface().(type) {
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case map[string]interface{}:
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set = make([]clause.Assignment, 0, len(value))
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keys := make([]string, 0, len(value))
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for k := range value {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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for _, k := range keys {
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kv := value[k]
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if _, ok := kv.(*gorm.DB); ok {
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kv = []interface{}{kv}
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}
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if stmt.Schema != nil {
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if field := stmt.Schema.LookUpField(k); field != nil {
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if field.DBName != "" {
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if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && !restricted) {
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set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: kv})
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assignValue(field, value[k])
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}
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} else if v, ok := selectColumns[field.Name]; (ok && v) || (!ok && !restricted) {
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assignValue(field, value[k])
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}
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continue
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}
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}
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if v, ok := selectColumns[k]; (ok && v) || (!ok && !restricted) {
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set = append(set, clause.Assignment{Column: clause.Column{Name: k}, Value: kv})
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}
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}
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if !stmt.SkipHooks && stmt.Schema != nil {
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for _, dbName := range stmt.Schema.DBNames {
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field := stmt.Schema.LookUpField(dbName)
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if field.AutoUpdateTime > 0 && value[field.Name] == nil && value[field.DBName] == nil {
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if v, ok := selectColumns[field.DBName]; (ok && v) || !ok {
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now := stmt.DB.NowFunc()
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assignValue(field, now)
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if field.AutoUpdateTime == schema.UnixNanosecond {
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set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: now.UnixNano()})
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} else if field.AutoUpdateTime == schema.UnixMillisecond {
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set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: now.UnixNano() / 1e6})
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} else if field.AutoUpdateTime == schema.UnixSecond {
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set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: now.Unix()})
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} else {
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set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: now})
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}
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}
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}
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}
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}
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default:
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updatingSchema := stmt.Schema
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var isDiffSchema bool
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if !updatingValue.CanAddr() || stmt.Dest != stmt.Model {
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// different schema
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updatingStmt := &gorm.Statement{DB: stmt.DB}
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if err := updatingStmt.Parse(stmt.Dest); err == nil {
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updatingSchema = updatingStmt.Schema
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isDiffSchema = true
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}
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}
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switch updatingValue.Kind() {
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case reflect.Struct:
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set = make([]clause.Assignment, 0, len(stmt.Schema.FieldsByDBName))
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for _, dbName := range stmt.Schema.DBNames {
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if field := updatingSchema.LookUpField(dbName); field != nil {
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if !field.PrimaryKey || !updatingValue.CanAddr() || stmt.Dest != stmt.Model {
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if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && (!restricted || (!stmt.SkipHooks && field.AutoUpdateTime > 0))) {
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value, isZero := field.ValueOf(stmt.Context, updatingValue)
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if !stmt.SkipHooks && field.AutoUpdateTime > 0 {
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if field.AutoUpdateTime == schema.UnixNanosecond {
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value = stmt.DB.NowFunc().UnixNano()
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} else if field.AutoUpdateTime == schema.UnixMillisecond {
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value = stmt.DB.NowFunc().UnixNano() / 1e6
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} else if field.AutoUpdateTime == schema.UnixSecond {
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value = stmt.DB.NowFunc().Unix()
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} else {
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value = stmt.DB.NowFunc()
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}
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isZero = false
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}
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if (ok || !isZero) && field.Updatable {
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set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: value})
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assignField := field
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if isDiffSchema {
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if originField := stmt.Schema.LookUpField(dbName); originField != nil {
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assignField = originField
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}
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}
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assignValue(assignField, value)
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}
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}
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} else {
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if value, isZero := field.ValueOf(stmt.Context, updatingValue); !isZero {
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stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.Eq{Column: field.DBName, Value: value}}})
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}
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}
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}
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}
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default:
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stmt.AddError(gorm.ErrInvalidData)
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}
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}
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return
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}
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