forked from mirror/gorm
93 lines
2.4 KiB
Go
93 lines
2.4 KiB
Go
package callbacks
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import (
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"reflect"
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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 BeforeDelete(db *gorm.DB) {
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if db.Statement.Schema != nil && db.Statement.Schema.BeforeDelete {
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callMethod := func(value interface{}) bool {
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if db.Statement.Schema.BeforeDelete {
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if i, ok := value.(gorm.BeforeDeleteInterface); ok {
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i.BeforeDelete(db)
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return true
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}
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}
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return false
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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 Delete(db *gorm.DB) {
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if db.Statement.SQL.String() == "" {
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db.Statement.AddClauseIfNotExists(clause.Delete{})
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values := []reflect.Value{db.Statement.ReflectValue}
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if db.Statement.Dest != db.Statement.Model {
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values = append(values, reflect.ValueOf(db.Statement.Model))
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}
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for _, field := range db.Statement.Schema.PrimaryFields {
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for _, value := range values {
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if value, isZero := field.ValueOf(value); !isZero {
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db.Statement.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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if _, ok := db.Statement.Clauses["WHERE"]; !ok {
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db.AddError(gorm.ErrMissingWhereClause)
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return
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}
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db.Statement.AddClauseIfNotExists(clause.From{})
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db.Statement.Build("DELETE", "FROM", "WHERE")
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}
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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 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 AfterDelete(db *gorm.DB) {
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if db.Statement.Schema != nil && db.Statement.Schema.AfterDelete {
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callMethod := func(value interface{}) bool {
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if db.Statement.Schema.AfterDelete {
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if i, ok := value.(gorm.AfterDeleteInterface); ok {
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i.AfterDelete(db)
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return true
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}
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}
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return false
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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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