Question

书

----------------------------
| id  |  name |  published |
----------------------------
|  1  | book1 |     1      |
|  2  | book2 |     1      |
|  3  | book3 |     0      |

章

----------------------------
| id  |  book_id |   name   | published |
----------------------------
|  1  |    1     | chapter1 |     1      |
|  2  |    1     | chapter2 |     0      |
|  2  |    2     | chapter1 |     0      |
|  3  |    3     | chapter1 |     1      |

class Book{
    public function getChapter()
    {
        return $this->hasMany(Chapter::className(), ['kook_id' => 'id']);
    } }

class Chapter{
    public function getBook()
    {
        return $this->hasOne(Book::className(), ['id' => 'book_id']);
    } }

如何使用ActiveRecord获取已发布网页的已发布图书（我希望将book1与chapter1和book2一起使用，不带任何章节）？

像Book :: find（$ id） - ＆gt;其中（['published'=＆gt; 1]） - ＆gt; {{{left join with where}}} - ＆gt; all（））

ADDED 然后我用魔杖来使用它

echo $book->name;
foreach($book->getChapter() as chapter){
    echo chapter->name;
}

Answer 1

将您的图书班级relation更改为

class Book
{
   public function getChapter()
   {
    return $this->hasMany(Chapter::className(), ['book_id' => 'id'])->where(['published' => 1]);
   }
}

要获取相关记录，请使用with()

Book::find()->with(['chapter'])->where(['id' => $id ,'published' => 1])->all()

使用它：

  //Book Name
  echo $book->name;

  //For Chapters Name
  if($book->chapter){
  foreach($book->chapter as $chapter){
    echo $chapter->name;
   }
}

Yii2 AR离开了哪里和关系

1 个答案: