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insert.go
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insert.go
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package sqlingo
import (
"database/sql"
"errors"
"fmt"
"reflect"
)
type insertStatus struct {
method string
scope scope
fields []Field
values []interface{}
models []interface{}
onDuplicateKeyUpdateAssignments []assignment
}
type insertWithTable interface {
Fields(fields ...Field) insertWithValues
Values(values ...interface{}) insertWithValues
Models(models ...interface{}) insertWithModels
}
type insertWithValues interface {
toInsertFinal
Values(values ...interface{}) insertWithValues
OnDuplicateKeyIgnore() toInsertFinal
OnDuplicateKeyUpdate() insertWithOnDuplicateKeyUpdateBegin
}
type insertWithModels interface {
toInsertFinal
Models(models ...interface{}) insertWithModels
OnDuplicateKeyIgnore() toInsertFinal
OnDuplicateKeyUpdate() insertWithOnDuplicateKeyUpdateBegin
}
type insertWithOnDuplicateKeyUpdateBegin interface {
Set(Field Field, value interface{}) insertWithOnDuplicateKeyUpdate
SetIf(condition bool, Field Field, value interface{}) insertWithOnDuplicateKeyUpdate
}
type insertWithOnDuplicateKeyUpdate interface {
toInsertFinal
Set(Field Field, value interface{}) insertWithOnDuplicateKeyUpdate
SetIf(condition bool, Field Field, value interface{}) insertWithOnDuplicateKeyUpdate
}
type toInsertFinal interface {
GetSQL() (string, error)
Execute() (result sql.Result, err error)
}
func (d *database) InsertInto(table Table) insertWithTable {
return insertStatus{method: "INSERT", scope: scope{Database: d, Tables: []Table{table}}}
}
func (d *database) ReplaceInto(table Table) insertWithTable {
return insertStatus{method: "REPLACE", scope: scope{Database: d, Tables: []Table{table}}}
}
func (s insertStatus) Fields(fields ...Field) insertWithValues {
s.fields = fields
return s
}
func (s insertStatus) Values(values ...interface{}) insertWithValues {
s.values = append([]interface{}{}, s.values...)
s.values = append(s.values, values)
return s
}
func addModel(models *[]Model, model interface{}) error {
if model, ok := model.(Model); ok {
*models = append(*models, model)
return nil
}
value := reflect.ValueOf(model)
switch value.Kind() {
case reflect.Ptr:
value = reflect.Indirect(value)
return addModel(models, value.Interface())
case reflect.Slice, reflect.Array:
for i := 0; i < value.Len(); i++ {
elem := value.Index(i)
addr := elem.Addr()
inter := addr.Interface()
if err := addModel(models, inter); err != nil {
return err
}
}
return nil
default:
return fmt.Errorf("unknown model type (kind = %d)", value.Kind())
}
}
func (s insertStatus) Models(models ...interface{}) insertWithModels {
s.models = models
return s
}
func (s insertStatus) OnDuplicateKeyUpdate() insertWithOnDuplicateKeyUpdateBegin {
return s
}
func (s insertStatus) SetIf(condition bool, field Field, value interface{}) insertWithOnDuplicateKeyUpdate {
if condition {
return s.Set(field, value)
}
return s
}
func (s insertStatus) Set(field Field, value interface{}) insertWithOnDuplicateKeyUpdate {
s.onDuplicateKeyUpdateAssignments = append([]assignment{}, s.onDuplicateKeyUpdateAssignments...)
s.onDuplicateKeyUpdateAssignments = append(s.onDuplicateKeyUpdateAssignments, assignment{
field: field,
value: value,
})
return s
}
func (s insertStatus) OnDuplicateKeyIgnore() toInsertFinal {
firstField := s.scope.Tables[0].GetFields()[0]
return s.OnDuplicateKeyUpdate().Set(firstField, firstField)
}
func (s insertStatus) GetSQL() (string, error) {
var fields []Field
var values []interface{}
if len(s.models) > 0 {
models := make([]Model, 0, len(s.models))
for _, model := range s.models {
if err := addModel(&models, model); err != nil {
return "", err
}
}
if len(models) > 0 {
fields = models[0].GetTable().GetFields()
for _, model := range models {
if model.GetTable().GetName() != s.scope.Tables[0].GetName() {
return "", errors.New("invalid table from model")
}
values = append(values, model.GetValues())
}
}
} else {
if len(s.fields) == 0 {
fields = s.scope.Tables[0].GetFields()
} else {
fields = s.fields
}
values = s.values
}
if len(values) == 0 {
return "/* INSERT without VALUES */ DO 0", nil
}
tableSql := s.scope.Tables[0].GetSQL(s.scope)
fieldsSql, err := commaFields(s.scope, fields)
if err != nil {
return "", err
}
valuesSql, err := commaValues(s.scope, values)
if err != nil {
return "", err
}
sqlString := s.method + " INTO " + tableSql + " (" + fieldsSql + ") VALUES " + valuesSql
if len(s.onDuplicateKeyUpdateAssignments) > 0 {
assignmentsSql, err := commaAssignments(s.scope, s.onDuplicateKeyUpdateAssignments)
if err != nil {
return "", err
}
sqlString += " ON DUPLICATE KEY UPDATE " + assignmentsSql
}
return sqlString, nil
}
func (s insertStatus) Execute() (result sql.Result, err error) {
sqlString, err := s.GetSQL()
if err != nil {
return nil, err
}
return s.scope.Database.Execute(sqlString)
}