gorm/callbacks/create.go

327 lines
11 KiB
Go

package callbacks
import (
"fmt"
"reflect"
"gorm.io/gorm"
"gorm.io/gorm/clause"
"gorm.io/gorm/schema"
)
func BeforeCreate(db *gorm.DB) {
if db.Error == nil && db.Statement.Schema != nil && !db.Statement.SkipHooks && (db.Statement.Schema.BeforeSave || db.Statement.Schema.BeforeCreate) {
callMethod(db, func(value interface{}, tx *gorm.DB) (called bool) {
if db.Statement.Schema.BeforeSave {
if i, ok := value.(BeforeSaveInterface); ok {
called = true
db.AddError(i.BeforeSave(tx))
}
}
if db.Statement.Schema.BeforeCreate {
if i, ok := value.(BeforeCreateInterface); ok {
called = true
db.AddError(i.BeforeCreate(tx))
}
}
return called
})
}
}
func Create(config *Config) func(db *gorm.DB) {
withReturning := false
for _, clause := range config.CreateClauses {
if clause == "RETURNING" {
withReturning = true
}
}
return func(db *gorm.DB) {
if db.Error != nil {
return
}
onReturning := false
if db.Statement.Schema != nil {
if !db.Statement.Unscoped {
for _, c := range db.Statement.Schema.CreateClauses {
db.Statement.AddClause(c)
}
}
if withReturning && len(db.Statement.Schema.FieldsWithDefaultDBValue) > 0 {
onReturning = true
if _, ok := db.Statement.Clauses["RETURNING"]; !ok {
fromColumns := make([]clause.Column, 0, len(db.Statement.Schema.FieldsWithDefaultDBValue))
for _, field := range db.Statement.Schema.FieldsWithDefaultDBValue {
fromColumns = append(fromColumns, clause.Column{Name: field.DBName})
}
db.Statement.AddClause(clause.Returning{Columns: fromColumns})
}
}
}
if db.Statement.SQL.String() == "" {
db.Statement.SQL.Grow(180)
db.Statement.AddClauseIfNotExists(clause.Insert{})
db.Statement.AddClause(ConvertToCreateValues(db.Statement))
db.Statement.Build(db.Statement.BuildClauses...)
}
if !db.DryRun && db.Error == nil {
if onReturning {
doNothing := false
if c, ok := db.Statement.Clauses["ON CONFLICT"]; ok {
onConflict, _ := c.Expression.(clause.OnConflict)
doNothing = onConflict.DoNothing
}
if rows, err := db.Statement.ConnPool.QueryContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...); db.AddError(err) == nil {
if doNothing {
gorm.Scan(rows, db, gorm.ScanUpdate|gorm.ScanOnConflictDoNothing)
} else {
gorm.Scan(rows, db, gorm.ScanUpdate)
}
rows.Close()
}
} else {
result, err := db.Statement.ConnPool.ExecContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
if err != nil {
db.AddError(err)
return
}
db.RowsAffected, _ = result.RowsAffected()
if db.RowsAffected != 0 && db.Statement.Schema != nil &&
db.Statement.Schema.PrioritizedPrimaryField != nil && db.Statement.Schema.PrioritizedPrimaryField.HasDefaultValue {
if insertID, err := result.LastInsertId(); err == nil && insertID > 0 {
switch db.Statement.ReflectValue.Kind() {
case reflect.Slice, reflect.Array:
if config.LastInsertIDReversed {
for i := db.Statement.ReflectValue.Len() - 1; i >= 0; i-- {
rv := db.Statement.ReflectValue.Index(i)
if reflect.Indirect(rv).Kind() != reflect.Struct {
break
}
_, isZero := db.Statement.Schema.PrioritizedPrimaryField.ValueOf(rv)
if isZero {
db.Statement.Schema.PrioritizedPrimaryField.Set(rv, insertID)
insertID -= db.Statement.Schema.PrioritizedPrimaryField.AutoIncrementIncrement
}
}
} else {
for i := 0; i < db.Statement.ReflectValue.Len(); i++ {
rv := db.Statement.ReflectValue.Index(i)
if reflect.Indirect(rv).Kind() != reflect.Struct {
break
}
if _, isZero := db.Statement.Schema.PrioritizedPrimaryField.ValueOf(rv); isZero {
db.Statement.Schema.PrioritizedPrimaryField.Set(rv, insertID)
insertID += db.Statement.Schema.PrioritizedPrimaryField.AutoIncrementIncrement
}
}
}
case reflect.Struct:
if _, isZero := db.Statement.Schema.PrioritizedPrimaryField.ValueOf(db.Statement.ReflectValue); isZero {
db.Statement.Schema.PrioritizedPrimaryField.Set(db.Statement.ReflectValue, insertID)
}
}
} else {
db.AddError(err)
}
}
}
}
}
}
func AfterCreate(db *gorm.DB) {
if db.Error == nil && db.Statement.Schema != nil && !db.Statement.SkipHooks && (db.Statement.Schema.AfterSave || db.Statement.Schema.AfterCreate) {
callMethod(db, func(value interface{}, tx *gorm.DB) (called bool) {
if db.Statement.Schema.AfterSave {
if i, ok := value.(AfterSaveInterface); ok {
called = true
db.AddError(i.AfterSave(tx))
}
}
if db.Statement.Schema.AfterCreate {
if i, ok := value.(AfterCreateInterface); ok {
called = true
db.AddError(i.AfterCreate(tx))
}
}
return called
})
}
}
// ConvertToCreateValues convert to create values
func ConvertToCreateValues(stmt *gorm.Statement) (values clause.Values) {
curTime := stmt.DB.NowFunc()
switch value := stmt.Dest.(type) {
case map[string]interface{}:
values = ConvertMapToValuesForCreate(stmt, value)
case *map[string]interface{}:
values = ConvertMapToValuesForCreate(stmt, *value)
case []map[string]interface{}:
values = ConvertSliceOfMapToValuesForCreate(stmt, value)
case *[]map[string]interface{}:
values = ConvertSliceOfMapToValuesForCreate(stmt, *value)
default:
var (
selectColumns, restricted = stmt.SelectAndOmitColumns(true, false)
_, updateTrackTime = stmt.Get("gorm:update_track_time")
isZero bool
)
stmt.Settings.Delete("gorm:update_track_time")
values = clause.Values{Columns: make([]clause.Column, 0, len(stmt.Schema.DBNames))}
for _, db := range stmt.Schema.DBNames {
if field := stmt.Schema.FieldsByDBName[db]; !field.HasDefaultValue || field.DefaultValueInterface != nil {
if v, ok := selectColumns[db]; (ok && v) || (!ok && (!restricted || field.AutoCreateTime > 0 || field.AutoUpdateTime > 0)) {
values.Columns = append(values.Columns, clause.Column{Name: db})
}
}
}
switch stmt.ReflectValue.Kind() {
case reflect.Slice, reflect.Array:
stmt.SQL.Grow(stmt.ReflectValue.Len() * 18)
values.Values = make([][]interface{}, stmt.ReflectValue.Len())
defaultValueFieldsHavingValue := map[*schema.Field][]interface{}{}
if stmt.ReflectValue.Len() == 0 {
stmt.AddError(gorm.ErrEmptySlice)
return
}
for i := 0; i < stmt.ReflectValue.Len(); i++ {
rv := reflect.Indirect(stmt.ReflectValue.Index(i))
if !rv.IsValid() {
stmt.AddError(fmt.Errorf("slice data #%v is invalid: %w", i, gorm.ErrInvalidData))
return
}
values.Values[i] = make([]interface{}, len(values.Columns))
for idx, column := range values.Columns {
field := stmt.Schema.FieldsByDBName[column.Name]
if values.Values[i][idx], isZero = field.ValueOf(rv); isZero {
if field.DefaultValueInterface != nil {
values.Values[i][idx] = field.DefaultValueInterface
field.Set(rv, field.DefaultValueInterface)
} else if field.AutoCreateTime > 0 || field.AutoUpdateTime > 0 {
field.Set(rv, curTime)
values.Values[i][idx], _ = field.ValueOf(rv)
}
} else if field.AutoUpdateTime > 0 && updateTrackTime {
field.Set(rv, curTime)
values.Values[i][idx], _ = field.ValueOf(rv)
}
}
for _, field := range stmt.Schema.FieldsWithDefaultDBValue {
if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && !restricted) {
if v, isZero := field.ValueOf(rv); !isZero {
if len(defaultValueFieldsHavingValue[field]) == 0 {
defaultValueFieldsHavingValue[field] = make([]interface{}, stmt.ReflectValue.Len())
}
defaultValueFieldsHavingValue[field][i] = v
}
}
}
}
for field, vs := range defaultValueFieldsHavingValue {
values.Columns = append(values.Columns, clause.Column{Name: field.DBName})
for idx := range values.Values {
if vs[idx] == nil {
values.Values[idx] = append(values.Values[idx], stmt.Dialector.DefaultValueOf(field))
} else {
values.Values[idx] = append(values.Values[idx], vs[idx])
}
}
}
case reflect.Struct:
values.Values = [][]interface{}{make([]interface{}, len(values.Columns))}
for idx, column := range values.Columns {
field := stmt.Schema.FieldsByDBName[column.Name]
if values.Values[0][idx], isZero = field.ValueOf(stmt.ReflectValue); isZero {
if field.DefaultValueInterface != nil {
values.Values[0][idx] = field.DefaultValueInterface
field.Set(stmt.ReflectValue, field.DefaultValueInterface)
} else if field.AutoCreateTime > 0 || field.AutoUpdateTime > 0 {
field.Set(stmt.ReflectValue, curTime)
values.Values[0][idx], _ = field.ValueOf(stmt.ReflectValue)
}
} else if field.AutoUpdateTime > 0 && updateTrackTime {
field.Set(stmt.ReflectValue, curTime)
values.Values[0][idx], _ = field.ValueOf(stmt.ReflectValue)
}
}
for _, field := range stmt.Schema.FieldsWithDefaultDBValue {
if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && !restricted) {
if v, isZero := field.ValueOf(stmt.ReflectValue); !isZero {
values.Columns = append(values.Columns, clause.Column{Name: field.DBName})
values.Values[0] = append(values.Values[0], v)
}
}
}
default:
stmt.AddError(gorm.ErrInvalidData)
}
}
if c, ok := stmt.Clauses["ON CONFLICT"]; ok {
if onConflict, _ := c.Expression.(clause.OnConflict); onConflict.UpdateAll {
if stmt.Schema != nil && len(values.Columns) >= 1 {
selectColumns, restricted := stmt.SelectAndOmitColumns(true, true)
columns := make([]string, 0, len(values.Columns)-1)
for _, column := range values.Columns {
if field := stmt.Schema.LookUpField(column.Name); field != nil {
if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && !restricted) {
if !field.PrimaryKey && (!field.HasDefaultValue || field.DefaultValueInterface != nil) && field.AutoCreateTime == 0 {
if field.AutoUpdateTime > 0 {
assignment := clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: curTime}
switch field.AutoUpdateTime {
case schema.UnixNanosecond:
assignment.Value = curTime.UnixNano()
case schema.UnixMillisecond:
assignment.Value = curTime.UnixNano() / 1e6
case schema.UnixSecond:
assignment.Value = curTime.Unix()
}
onConflict.DoUpdates = append(onConflict.DoUpdates, assignment)
} else {
columns = append(columns, column.Name)
}
}
}
}
}
onConflict.DoUpdates = append(onConflict.DoUpdates, clause.AssignmentColumns(columns)...)
// use primary fields as default OnConflict columns
if len(onConflict.Columns) == 0 {
for _, field := range stmt.Schema.PrimaryFields {
onConflict.Columns = append(onConflict.Columns, clause.Column{Name: field.DBName})
}
}
stmt.AddClause(onConflict)
}
}
}
return values
}