在cakephp 2.x中如何使用连接表获取第三个表数据？

'books 
    id,name 
categories 
    id,name 
books_categories 
    id,book_id,category_id'

'App :: uses（'AppModel'，'Model'）; 类图书扩展AppModel {在cakephp 2.x中如何使用连接表获取第三个表数据？

public $useTable = 'books'; 
    public $belongsTo = array(

     'Agerange' => array(
      'className' => 'Agerange', 
      'foreignKey' => 'agerange_id' 
     ), 
     'Publication' => array(
      'className' => 'Publication', 
      'foreignKey' => 'publication_id' 
     ), 
    ); 

    public $hasMany = array(
     'Category' => array(
      'className' => 'Book_Category', 
      'foreignKey' => 'book_id', 
      'joinTable' => 'books_categories', 
      'fields' => array('Category_id',),   
     ) 
    ); 
} 

<?php 
App::uses('AppModel', 'Model'); 
class Book_Category extends AppModel { 
    public $useTable = 'books_categories'; 

    public $belongsTo = array(
     'Book' => array(
      'className' => 'Book', 
      'foreignKey' => 'book_id' 
     ), 
     'Category' => array(
      'className' => 'Category', 
      'foreignKey' => 'category_id' 
     ) 
    ); 


} 

in BooksController ...... 

$this->paginate = array(
      'contains'=>array('Book','Publication','Agerange','Book_Category'),    
      'order' => 'Book.id ASC'); 

      $books = $this->paginate('Book'); 

    enter code here 


{ 
Book: {id: "111", title: "ABC", subtitle: "English Today Primer", author: "Pruthviraj",…},…} 
Agerange:{id: "31", from: "0", to: "2", status: true} 
Book:{id: "111", title: "ABC", subtitle: "English Today Primer", author: "Pruthviraj",…} 
Category:[{Category_id: "5", book_id: "111"}] 
}'

输出现在我只得到CATEGORY_ID：5这没关系，但我想的名字字段也范畴，所以我怎样才能用书和Book_Category类别的名称字段？

来源

2016-11-07 Pruthvi Rathod

尝试增加$这个 - >型号 - >递归= 2表上执行查询之前。它会根据您在模型上设置的属于或所有条件自动获取相应的数据 –

加入Categoy到Book_Category

$this->paginate = array(
    'contains' => array(
     'Book', 
     'Publication', 
     'Agerange', 
     'Book_Category' => 'Category' 
    ), 
    'order' => 'Book.id ASC' 
);

或使用hasAndBelongsToMany关联修改您的包含阵列，它的简单得多

开始通过删除Book_Category

然后换书模式

class Book extends AppModel { 

public $useTable = 'books'; 

public $belongsTo = array(
    'Agerange' => array(
     'className' => 'Agerange', 
     'foreignKey' => 'agerange_id' 
    ), 
    'Publication' => array(
     'className' => 'Publication', 
     'foreignKey' => 'publication_id' 
    ), 
); 

public $hasAndBelongsToMany = array(
    'Category' => array(
     'className' => 'Category', 
     'joinTable' => 'books_categories', 
     'foreignKey' => 'book_id', 
     'associationForeignKey' => 'category_id' 
    ) 
);

}

然后，在你的控制器来更改设置分页这样

@link Cakephp HABTM association

来源

2016-11-07 12:59:12

在cakephp 2.x中如何使用连接表获取第三个表数据？

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