github.com/ecodeclub/eorm@v0.0.2-0.20231001112437-dae71da914d0/internal/rows/convert_assign.go (about)

     1  // Copyright 2021 ecodeclub
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  // http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package rows
    16  
    17  import (
    18  	"database/sql"
    19  	"database/sql/driver"
    20  	_ "unsafe"
    21  )
    22  
    23  //go:linkname sqlConvertAssign database/sql.convertAssign
    24  func sqlConvertAssign(dest, src any) error
    25  
    26  func ConvertAssign(dest, src any) error {
    27  	srcVal, ok := src.(driver.Valuer)
    28  	if ok {
    29  		var err error
    30  		src, err = srcVal.Value()
    31  		if err != nil {
    32  			return err
    33  		}
    34  	}
    35  	// 预处理一下 sqlConvertAssign 不支持的转换，遇到一个加一个
    36  	switch sv := src.(type) {
    37  	case sql.RawBytes:
    38  		switch dv := dest.(type) {
    39  		case *string:
    40  			*dv = string(sv)
    41  			return nil
    42  		}
    43  	}
    44  	return sqlConvertAssign(dest, src)
    45  }