mirror of https://github.com/go-gorm/gorm.git
135 lines
3.6 KiB
Go
135 lines
3.6 KiB
Go
package callbacks
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import (
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"reflect"
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"sort"
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"github.com/jinzhu/gorm"
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"github.com/jinzhu/gorm/clause"
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)
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func BeforeUpdate(db *gorm.DB) {
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if db.Statement.Schema != nil && (db.Statement.Schema.BeforeSave || db.Statement.Schema.BeforeUpdate) {
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callMethod := func(value interface{}) bool {
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var ok bool
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if db.Statement.Schema.BeforeSave {
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if i, ok := value.(gorm.BeforeSaveInterface); ok {
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ok = true
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i.BeforeSave(db)
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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.(gorm.BeforeUpdateInterface); ok {
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ok = true
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i.BeforeUpdate(db)
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}
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}
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return ok
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}
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if ok := callMethod(db.Statement.Dest); !ok {
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switch db.Statement.ReflectValue.Kind() {
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case reflect.Slice, reflect.Array:
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for i := 0; i <= db.Statement.ReflectValue.Len(); i++ {
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callMethod(db.Statement.ReflectValue.Index(i).Interface())
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}
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case reflect.Struct:
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callMethod(db.Statement.ReflectValue.Interface())
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}
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}
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}
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}
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func Update(db *gorm.DB) {
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db.Statement.AddClauseIfNotExists(clause.Update{})
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db.Statement.AddClause(ConvertToAssignments(db.Statement))
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db.Statement.Build("UPDATE", "SET", "WHERE")
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result, err := db.DB.ExecContext(db.Context, db.Statement.SQL.String(), db.Statement.Vars...)
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if err == nil {
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db.RowsAffected, _ = result.RowsAffected()
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} else {
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db.AddError(err)
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}
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}
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func AfterUpdate(db *gorm.DB) {
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if db.Statement.Schema != nil && (db.Statement.Schema.AfterSave || db.Statement.Schema.AfterUpdate) {
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callMethod := func(value interface{}) bool {
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var ok bool
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if db.Statement.Schema.AfterSave {
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if i, ok := value.(gorm.AfterSaveInterface); ok {
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ok = true
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i.AfterSave(db)
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}
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}
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if db.Statement.Schema.AfterUpdate {
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if i, ok := value.(gorm.AfterUpdateInterface); ok {
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ok = true
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i.AfterUpdate(db)
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}
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}
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return ok
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}
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if ok := callMethod(db.Statement.Dest); !ok {
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switch db.Statement.ReflectValue.Kind() {
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case reflect.Slice, reflect.Array:
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for i := 0; i <= db.Statement.ReflectValue.Len(); i++ {
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callMethod(db.Statement.ReflectValue.Index(i).Interface())
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}
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case reflect.Struct:
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callMethod(db.Statement.ReflectValue.Interface())
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}
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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) clause.Set {
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selectColumns, restricted := SelectAndOmitColumns(stmt)
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reflectModelValue := reflect.ValueOf(stmt.Model)
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switch value := stmt.Dest.(type) {
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case map[string]interface{}:
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var set clause.Set = make([]clause.Assignment, 0, len(value))
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var keys []string
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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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if field := stmt.Schema.LookUpField(k); field != nil {
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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: value[k]})
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field.Set(reflectModelValue, value[k])
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}
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} else if v, ok := selectColumns[k]; (ok && v) || (!ok && !restricted) {
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set = append(set, clause.Assignment{Column: clause.Column{Name: k}, Value: value[k]})
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}
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}
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return set
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default:
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switch stmt.ReflectValue.Kind() {
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case reflect.Struct:
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var set clause.Set = make([]clause.Assignment, 0, len(stmt.Schema.FieldsByDBName))
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for _, field := range stmt.Schema.FieldsByDBName {
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if v, ok := selectColumns[field.DBName]; (ok && v) || (!ok && !restricted) {
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value, _ := field.ValueOf(stmt.ReflectValue)
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set = append(set, clause.Assignment{Column: clause.Column{Name: field.DBName}, Value: value})
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field.Set(reflectModelValue, value)
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}
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}
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return set
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}
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}
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return clause.Set{}
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}
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