ipbl/vendor/xorm.io/xorm/internal/statements/update.go

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2021-11-07 20:44:48 +01:00
// Copyright 2017 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package statements
import (
"database/sql/driver"
"errors"
"fmt"
"reflect"
"time"
"xorm.io/builder"
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"xorm.io/xorm/convert"
"xorm.io/xorm/dialects"
"xorm.io/xorm/internal/json"
"xorm.io/xorm/internal/utils"
"xorm.io/xorm/schemas"
)
func (statement *Statement) ifAddColUpdate(col *schemas.Column, includeVersion, includeUpdated, includeNil,
includeAutoIncr, update bool,
) (bool, error) {
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columnMap := statement.ColumnMap
omitColumnMap := statement.OmitColumnMap
unscoped := statement.unscoped
if !includeVersion && col.IsVersion {
return false, nil
}
if col.IsCreated && !columnMap.Contain(col.Name) {
return false, nil
}
if !includeUpdated && col.IsUpdated {
return false, nil
}
if !includeAutoIncr && col.IsAutoIncrement {
return false, nil
}
if col.IsDeleted && !unscoped {
return false, nil
}
if omitColumnMap.Contain(col.Name) {
return false, nil
}
if len(columnMap) > 0 && !columnMap.Contain(col.Name) {
return false, nil
}
if col.MapType == schemas.ONLYFROMDB {
return false, nil
}
if statement.IncrColumns.IsColExist(col.Name) {
return false, nil
} else if statement.DecrColumns.IsColExist(col.Name) {
return false, nil
} else if statement.ExprColumns.IsColExist(col.Name) {
return false, nil
}
return true, nil
}
// BuildUpdates auto generating update columnes and values according a struct
func (statement *Statement) BuildUpdates(tableValue reflect.Value,
includeVersion, includeUpdated, includeNil,
includeAutoIncr, update bool,
) ([]string, []interface{}, error) {
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table := statement.RefTable
allUseBool := statement.allUseBool
useAllCols := statement.useAllCols
mustColumnMap := statement.MustColumnMap
nullableMap := statement.NullableMap
colNames := make([]string, 0)
args := make([]interface{}, 0)
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for _, col := range table.Columns() {
ok, err := statement.ifAddColUpdate(col, includeVersion, includeUpdated, includeNil,
includeAutoIncr, update)
if err != nil {
return nil, nil, err
}
if !ok {
continue
}
fieldValuePtr, err := col.ValueOfV(&tableValue)
if err != nil {
return nil, nil, err
}
if fieldValuePtr == nil {
continue
}
fieldValue := *fieldValuePtr
fieldType := reflect.TypeOf(fieldValue.Interface())
if fieldType == nil {
continue
}
requiredField := useAllCols
includeNil := useAllCols
if b, ok := getFlagForColumn(mustColumnMap, col); ok {
if b {
requiredField = true
} else {
continue
}
}
// !evalphobia! set fieldValue as nil when column is nullable and zero-value
if b, ok := getFlagForColumn(nullableMap, col); ok {
if b && col.Nullable && utils.IsZero(fieldValue.Interface()) {
var nilValue *int
fieldValue = reflect.ValueOf(nilValue)
fieldType = reflect.TypeOf(fieldValue.Interface())
includeNil = true
}
}
var val interface{}
if fieldValue.CanAddr() {
if structConvert, ok := fieldValue.Addr().Interface().(convert.Conversion); ok {
data, err := structConvert.ToDB()
if err != nil {
return nil, nil, err
}
if data != nil {
val = data
if !col.SQLType.IsBlob() {
val = string(data)
}
}
goto APPEND
}
}
if structConvert, ok := fieldValue.Interface().(convert.Conversion); ok && !fieldValue.IsNil() {
data, err := structConvert.ToDB()
if err != nil {
return nil, nil, err
}
if data != nil {
val = data
if !col.SQLType.IsBlob() {
val = string(data)
}
}
goto APPEND
}
if fieldType.Kind() == reflect.Ptr {
if fieldValue.IsNil() {
if includeNil {
args = append(args, nil)
colNames = append(colNames, fmt.Sprintf("%v=?", statement.quote(col.Name)))
}
continue
} else if !fieldValue.IsValid() {
continue
} else {
// dereference ptr type to instance type
fieldValue = fieldValue.Elem()
fieldType = reflect.TypeOf(fieldValue.Interface())
requiredField = true
}
}
switch fieldType.Kind() {
case reflect.Bool:
if allUseBool || requiredField {
val = fieldValue.Interface()
} else {
// if a bool in a struct, it will not be as a condition because it default is false,
// please use Where() instead
continue
}
case reflect.String:
if !requiredField && fieldValue.String() == "" {
continue
}
// for MyString, should convert to string or panic
if fieldType.String() != reflect.String.String() {
val = fieldValue.String()
} else {
val = fieldValue.Interface()
}
case reflect.Int8, reflect.Int16, reflect.Int, reflect.Int32, reflect.Int64:
if !requiredField && fieldValue.Int() == 0 {
continue
}
val = fieldValue.Interface()
case reflect.Float32, reflect.Float64:
if !requiredField && fieldValue.Float() == 0.0 {
continue
}
val = fieldValue.Interface()
case reflect.Uint8, reflect.Uint16, reflect.Uint, reflect.Uint32, reflect.Uint64:
if !requiredField && fieldValue.Uint() == 0 {
continue
}
val = fieldValue.Interface()
case reflect.Struct:
if fieldType.ConvertibleTo(schemas.TimeType) {
t := fieldValue.Convert(schemas.TimeType).Interface().(time.Time)
if !requiredField && (t.IsZero() || !fieldValue.IsValid()) {
continue
}
val, err = dialects.FormatColumnTime(statement.dialect, statement.defaultTimeZone, col, t)
if err != nil {
return nil, nil, err
}
} else if nulType, ok := fieldValue.Interface().(driver.Valuer); ok {
val, _ = nulType.Value()
if val == nil && !requiredField {
continue
}
} else {
if !col.IsJSON {
table, err := statement.tagParser.ParseWithCache(fieldValue)
if err != nil {
val = fieldValue.Interface()
} else {
if len(table.PrimaryKeys) == 1 {
pkField := reflect.Indirect(fieldValue).FieldByName(table.PKColumns()[0].FieldName)
// fix non-int pk issues
if pkField.IsValid() && (!requiredField && !utils.IsZero(pkField.Interface())) {
val = pkField.Interface()
} else {
continue
}
} else {
return nil, nil, errors.New("Not supported multiple primary keys")
}
}
} else {
// Blank struct could not be as update data
if requiredField || !utils.IsStructZero(fieldValue) {
bytes, err := json.DefaultJSONHandler.Marshal(fieldValue.Interface())
if err != nil {
return nil, nil, fmt.Errorf("mashal %v failed", fieldValue.Interface())
}
if col.SQLType.IsText() {
val = string(bytes)
} else if col.SQLType.IsBlob() {
val = bytes
}
} else {
continue
}
}
}
case reflect.Array, reflect.Slice, reflect.Map:
if !requiredField {
if fieldValue == reflect.Zero(fieldType) {
continue
}
if fieldType.Kind() == reflect.Array {
if utils.IsArrayZero(fieldValue) {
continue
}
} else if fieldValue.IsNil() || !fieldValue.IsValid() || fieldValue.Len() == 0 {
continue
}
}
if col.SQLType.IsText() {
bytes, err := json.DefaultJSONHandler.Marshal(fieldValue.Interface())
if err != nil {
return nil, nil, err
}
val = string(bytes)
} else if col.SQLType.IsBlob() {
var bytes []byte
var err error
if fieldType.Kind() == reflect.Slice &&
fieldType.Elem().Kind() == reflect.Uint8 {
if fieldValue.Len() > 0 {
val = fieldValue.Bytes()
} else {
continue
}
} else if fieldType.Kind() == reflect.Array &&
fieldType.Elem().Kind() == reflect.Uint8 {
val = fieldValue.Slice(0, 0).Interface()
} else {
bytes, err = json.DefaultJSONHandler.Marshal(fieldValue.Interface())
if err != nil {
return nil, nil, err
}
val = bytes
}
} else {
continue
}
default:
val = fieldValue.Interface()
}
APPEND:
args = append(args, val)
colNames = append(colNames, fmt.Sprintf("%v = ?", statement.quote(col.Name)))
}
return colNames, args, nil
}
func (statement *Statement) writeUpdateTop(updateWriter *builder.BytesWriter) error {
if statement.dialect.URI().DBType != schemas.MSSQL || statement.LimitN == nil {
return nil
}
table := statement.RefTable
if statement.HasOrderBy() && table != nil && len(table.PrimaryKeys) == 1 {
return nil
}
_, err := fmt.Fprintf(updateWriter, " TOP (%d)", *statement.LimitN)
return err
}
func (statement *Statement) writeUpdateTableName(updateWriter *builder.BytesWriter) error {
tableName := statement.quote(statement.TableName())
if statement.TableAlias == "" {
_, err := fmt.Fprint(updateWriter, " ", tableName)
return err
}
switch statement.dialect.URI().DBType {
case schemas.MSSQL:
_, err := fmt.Fprint(updateWriter, " ", statement.TableAlias)
return err
default:
_, err := fmt.Fprint(updateWriter, " ", tableName, " AS ", statement.TableAlias)
return err
}
}
func (statement *Statement) writeUpdateFrom(updateWriter *builder.BytesWriter) error {
if statement.dialect.URI().DBType != schemas.MSSQL || statement.TableAlias == "" {
return nil
}
_, err := fmt.Fprint(updateWriter, " FROM ", statement.quote(statement.TableName()), " ", statement.TableAlias)
return err
}
func (statement *Statement) writeUpdateLimit(updateWriter *builder.BytesWriter, cond builder.Cond) error {
if statement.LimitN == nil {
return nil
}
table := statement.RefTable
tableName := statement.TableName()
limitValue := *statement.LimitN
switch statement.dialect.URI().DBType {
case schemas.MYSQL:
_, err := fmt.Fprintf(updateWriter, " LIMIT %d", limitValue)
return err
case schemas.SQLITE:
if cond.IsValid() {
if _, err := fmt.Fprint(updateWriter, " AND "); err != nil {
return err
}
} else {
if _, err := fmt.Fprint(updateWriter, " WHERE "); err != nil {
return err
}
}
if _, err := fmt.Fprint(updateWriter, "rowid IN (SELECT rowid FROM ", statement.quote(tableName)); err != nil {
return err
}
if err := statement.writeWhereCond(updateWriter, cond); err != nil {
return err
}
if err := statement.writeOrderBys(updateWriter); err != nil {
return err
}
_, err := fmt.Fprintf(updateWriter, " LIMIT %d)", limitValue)
return err
case schemas.POSTGRES:
if cond.IsValid() {
if _, err := fmt.Fprint(updateWriter, " AND "); err != nil {
return err
}
} else {
if _, err := fmt.Fprint(updateWriter, " WHERE "); err != nil {
return err
}
}
if _, err := fmt.Fprint(updateWriter, "CTID IN (SELECT CTID FROM ", statement.quote(tableName)); err != nil {
return err
}
if err := statement.writeWhereCond(updateWriter, cond); err != nil {
return err
}
if err := statement.writeOrderBys(updateWriter); err != nil {
return err
}
_, err := fmt.Fprintf(updateWriter, " LIMIT %d)", limitValue)
return err
case schemas.MSSQL:
if statement.HasOrderBy() && table != nil && len(table.PrimaryKeys) == 1 {
if _, err := fmt.Fprintf(updateWriter, " WHERE %s IN (SELECT TOP (%d) %s FROM %v",
table.PrimaryKeys[0], limitValue, table.PrimaryKeys[0],
statement.quote(tableName)); err != nil {
return err
}
if err := statement.writeWhereCond(updateWriter, cond); err != nil {
return err
}
if err := statement.writeOrderBys(updateWriter); err != nil {
return err
}
_, err := fmt.Fprint(updateWriter, ")")
return err
}
return nil
default: // TODO: Oracle support needed
return fmt.Errorf("not implemented")
}
}
func (statement *Statement) GenConditionsFromMap(m interface{}) ([]builder.Cond, error) {
switch t := m.(type) {
case map[string]interface{}:
conds := []builder.Cond{}
for k, v := range t {
conds = append(conds, builder.Eq{k: v})
}
return conds, nil
case map[string]string:
conds := []builder.Cond{}
for k, v := range t {
conds = append(conds, builder.Eq{k: v})
}
return conds, nil
default:
return nil, fmt.Errorf("unsupported condition map type %v", t)
}
}
func (statement *Statement) writeVersionIncrSet(w builder.Writer, v reflect.Value, hasPreviousSet bool) error {
if v.Type().Kind() != reflect.Struct {
return nil
}
table := statement.RefTable
if !(statement.RefTable != nil && table.Version != "" && statement.CheckVersion) {
return nil
}
verValue, err := table.VersionColumn().ValueOfV(&v)
if err != nil {
return err
}
if verValue == nil {
return nil
}
if hasPreviousSet {
if _, err := fmt.Fprint(w, ", "); err != nil {
return err
}
}
if _, err := fmt.Fprint(w, statement.quote(table.Version), " = ", statement.quote(table.Version), " + 1"); err != nil {
return err
}
return nil
}
func (statement *Statement) writeIncrSets(w builder.Writer, hasPreviousSet bool) error {
for i, expr := range statement.IncrColumns {
if i > 0 || hasPreviousSet {
if _, err := fmt.Fprint(w, ", "); err != nil {
return err
}
}
if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ", statement.quote(expr.ColName), " + ?"); err != nil {
return err
}
w.Append(expr.Arg)
}
return nil
}
func (statement *Statement) writeDecrSets(w builder.Writer, hasPreviousSet bool) error {
// for update action to like "column = column - ?"
for i, expr := range statement.DecrColumns {
if i > 0 || hasPreviousSet {
if _, err := fmt.Fprint(w, ", "); err != nil {
return err
}
}
if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ", statement.quote(expr.ColName), " - ?"); err != nil {
return err
}
w.Append(expr.Arg)
}
return nil
}
func (statement *Statement) writeExprSets(w *builder.BytesWriter, hasPreviousSet bool) error {
// for update action to like "column = expression"
for i, expr := range statement.ExprColumns {
if i > 0 || hasPreviousSet {
if _, err := fmt.Fprint(w, ", "); err != nil {
return err
}
}
switch tp := expr.Arg.(type) {
case string:
if len(tp) == 0 {
tp = "''"
}
if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ", tp); err != nil {
return err
}
case *builder.Builder:
if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ("); err != nil {
return err
}
if err := tp.WriteTo(statement.QuoteReplacer(w)); err != nil {
return err
}
if _, err := fmt.Fprint(w, ")"); err != nil {
return err
}
default:
if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ?"); err != nil {
return err
}
w.Append(expr.Arg)
}
}
return nil
}
func (statement *Statement) writeUpdateSets(w *builder.BytesWriter, v reflect.Value, colNames []string, args []interface{}) error {
previousLen := w.Len()
for i, colName := range colNames {
if i > 0 {
if _, err := fmt.Fprint(w, ", "); err != nil {
return err
}
}
if _, err := fmt.Fprint(w, colName); err != nil {
return err
}
}
w.Append(args...)
if err := statement.writeIncrSets(w, w.Len() > previousLen); err != nil {
return err
}
if err := statement.writeDecrSets(w, w.Len() > previousLen); err != nil {
return err
}
if err := statement.writeExprSets(w, w.Len() > previousLen); err != nil {
return err
}
if err := statement.writeVersionIncrSet(w, v, w.Len() > previousLen); err != nil {
return err
}
return nil
}
var ErrNoColumnsTobeUpdated = errors.New("no columns found to be updated")
func (statement *Statement) WriteUpdate(updateWriter *builder.BytesWriter, cond builder.Cond, v reflect.Value, colNames []string, args []interface{}) error {
if _, err := fmt.Fprintf(updateWriter, "UPDATE"); err != nil {
return err
}
if err := statement.writeUpdateTop(updateWriter); err != nil {
return err
}
if err := statement.writeUpdateTableName(updateWriter); err != nil {
return err
}
// write set
if _, err := fmt.Fprint(updateWriter, " SET "); err != nil {
return err
}
previousLen := updateWriter.Len()
if err := statement.writeUpdateSets(updateWriter, v, colNames, args); err != nil {
return err
}
// if no columns to be updated, return error
if previousLen == updateWriter.Len() {
return ErrNoColumnsTobeUpdated
}
// write from
if err := statement.writeUpdateFrom(updateWriter); err != nil {
return err
}
if statement.dialect.URI().DBType == schemas.MSSQL {
table := statement.RefTable
if statement.HasOrderBy() && table != nil && len(table.PrimaryKeys) == 1 {
} else {
// write where
if err := statement.writeWhereCond(updateWriter, cond); err != nil {
return err
}
}
} else {
// write where
if err := statement.writeWhereCond(updateWriter, cond); err != nil {
return err
}
}
if statement.dialect.URI().DBType == schemas.MYSQL {
if err := statement.writeOrderBys(updateWriter); err != nil {
return err
}
}
return statement.writeUpdateLimit(updateWriter, cond)
}