Gorm Statement.table has a BUG. - Nineya|java/go/python

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 = ?;

Comment From: github-actions[bot]

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Comment From: github-actions[bot]

Comment From: paradox-lab2

maybe, we will get the following results SELECT * FROM `database`.other_table WHERE id = ? limit 1;

where can i get the results from? .Debug() method?

Comment From: github-actions[bot]