Statement.table has a BUG.

[YuzuWiki]

GORM Playground Link

Description

Statement.table. If it exists and is an unexpected value, it may cause the query to not meet expectations.

• Source Code:

https://github.com/go-gorm/gorm/blob/master/statement.go

lool this: LINE 493, err == nil && stmt.Table == ""

func (stmt *Statement) ParseWithSpecialTableName(value interface{}, specialTableName string) (err error) {
	if stmt.Schema, err = schema.ParseWithSpecialTableName(value, stmt.DB.cacheStore, stmt.DB.NamingStrategy, specialTableName); err == nil && stmt.Table == "" {
		if tables := strings.Split(stmt.Schema.Table, "."); len(tables) == 2 {
			stmt.TableExpr = &clause.Expr{SQL: stmt.Quote(stmt.Schema.Table)}
			stmt.Table = tables[1]
			return
		}

		stmt.Table = stmt.Schema.Table
	}
	return err
}

Example：

• exec sql

db, _ = gorm.Open(mysql.Open(dsn), &config)


#  use SQL 
type OtherTable struct {
   Name string 
}

var retSQL OtherTable 
db.Raw(`SELECT name FROM xxx JOIN  ..... LIMIT 1;`).Scan(&retSQL )

some time, db.statement.table will be set to other_table. now, db looks like this

db: {
     Statement:  {
           Table:    "other_table",
           Model:   nil,
          ........
     }
}

now，If we continue to execute

type User struct {
    ......
}

func (u User )  TableName()  string {
    return "user"
}


var u User 
db.Model(User{}).Where("id =?", uid).Find(&u)

maybe, we will get the following results

    SELECT * FROM `database`.other_table WHERE id = ? limit 1;

but our expected result is

    SELECT * FROM `database`.user WHERE id = ?;

[github-actions]

The issue has been automatically marked as stale as it missing playground pull request link, which is important to help others understand your issue effectively and make sure the issue hasn't been fixed on latest master, checkout https://github.com/go-gorm/playground for details. it will be closed in 30 days if no further activity occurs. if you are asking question, please use the Question template, most likely your question already answered https://github.com/go-gorm/gorm/issues or described in the document https://gorm.io ✨ Search Before Asking ✨

[github-actions]

The issue has been automatically marked as stale as it missing playground pull request link, which is important to help others understand your issue effectively and make sure the issue hasn't been fixed on latest master, checkout https://github.com/go-gorm/playground for details. it will be closed in 30 days if no further activity occurs. if you are asking question, please use the Question template, most likely your question already answered https://github.com/go-gorm/gorm/issues or described in the document https://gorm.io ✨ Search Before Asking ✨