Laravel航海者：BelongsToMany

Question

我有 table 本书和作者。我想获得将作者附加到书籍的能力。我为书籍调整 BREAD：

使用这些设置，我可以点击编辑并为我的书选择作者，但是当我尝试保存书籍时，laravel 给出了这个错误：

 SQLSTATE[HY000]: General error: 1366 Incorrect integer value: 'Mrs. Alivia 
 Stanton IV' for column 'authors_id' at row 1 (SQL: insert into 
 `authors_books` (`authors_id`, `books_id`) values (Mrs. Alivia Stanton IV, 
 55))

这是合乎逻辑的。但是当我将 name 切换到 id 时，laravel 给出了这个错误：

 SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'id' in field 
 list is ambiguous (SQL: select `id` from `authors` inner join 
 `authors_books` on `authors`.`id` = `authors_books`.`authors_id` where 
  `authors_books`.`books_id` = 57) (View:

我尝试使用所有组合，但没有任何反应。

样板书：

class Books extends Model
{   
protected $fillable = ['name','img'];

public function authors()
{
    return $this->belongsToMany('App\Authors');
}

public function getImgAttribute($img)
{   
    if(!empty($img)){
        return 'storage/images/books/'.$img;
    }else{
        return 'storage/images/books/not-found.jpg';
    }
}

 }

模型作者：

class Authors extends Model
 {

protected $fillable = ['name','img'];

public function books()
{
    return $this->belongsToMany('App\Books');
}

public function getImgAttribute($img)
{   
    if(!empty($img)){
        return 'storage/images/authors/'.$img;
    }else{
        return 'storage/images/books/not-found.jpg';
    }
}
}

请帮忙！

Answer 1

样板书：

class Books extends Model
{   
protected $fillable = ['name','img'];

public function authors()
{
    return $this->belongsToMany('App\Author','Pivot table');
}

public function getImgAttribute($img)
{   
    if(!empty($img)){
        return 'storage/images/books/'.$img;
    }else{
        return 'storage/images/books/not-found.jpg';
    }
}

 }

模型作者：

class Authors extends Model
 {

protected $fillable = ['name','img'];

public function books()
{
    return $this->belongsToMany('App\Book,'Pivot table');
}

public function getImgAttribute($img)
{   
    if(!empty($img)){
        return 'storage/images/authors/'.$img;
    }else{
        return 'storage/images/books/not-found.jpg';
    }
}
}

请阅读此文档以更好地理解http://laraveldaily.com/pivot-tables-and-many-to-many-relationships/

Laravel航海者：BelongsToMany

Laravel Voyager: BelongsToMany

php

laravel

laravel-5

voyager