Php Yii活动记录-关系表中的位置
我的mysql数据库中有以下表格:Php Yii活动记录-关系表中的位置,php,mysql,activerecord,yii,Php,Mysql,Activerecord,Yii,我的mysql数据库中有以下表格: category (id,name, url) recipe_categories (category_id, recipe_id) recipes (id, name, description) 我想实现的SQL语句如下所示: SELECT * FROM recipes r INNER JOIN recipe_categories cr ON cr.recipe_id = r.id INNER JOIN category c ON c.id = cr.c
category (id,name, url)
recipe_categories (category_id, recipe_id)
recipes (id, name, description)
我想实现的SQL语句如下所示:
SELECT * FROM recipes r
INNER JOIN recipe_categories cr ON cr.recipe_id = r.id
INNER JOIN category c ON c.id = cr.category_id
WHERE c.url = "google.de"
这两种模式:
<?php
class RecipeCategoryModel extends CActiveRecord
{
public static function model($className=__CLASS__)
{
return parent::model($className);
}
public function tableName()
{
return 'recipe_categories';
}
public function relations()
{
return array(
'recipes' => array(self::MANY_MANY , 'RecipeModel', 'recipe_has_categories(recipe_category_id,recipe_id)'),
);
}
public function getActive() {
return RecipeCategoryModel::model()->with(array(
'recipes'=>array(
'joinType'=>'INNER JOIN',
),
))->findAll();
}
}
?>
<?php
class RecipeModel extends CActiveRecord
{
public static function model($className=__CLASS__)
{
return parent::model($className);
}
public function tableName()
{
return 'recipes';
}
public function relations()
{
return array(
'categories' => array(self::MANY_MANY , 'RecipeCategoryModel', 'recipe_has_categories(recipe_id,recipe_category_id)'),
);
}
public function getMainImage() {
}
}
?>
问题是WHERE子句。我如何使用ActiveRecord(with(),CDbCriteria,…)实现这一点?在考虑这个问题的答案时,我不得不稍微清理一下您的db表和模型名称,因为提供的代码在测试时导致了一些错误。但是我已经能够生成您想要的SQL语句了——但是请记住,当使用Yii的ActiveRecord时,它使用自己的语法和表别名 我得到的结果是:
SELECT `t`.`id` AS `t0_c0`, `t`.`name` AS `t0_c1`, `t`.`description` AS `t0_c2`, `categories`.`id` AS `t1_c0`, `categories`.`name` AS `t1_c1`, `categories`.`url` AS `t1_c2`
FROM `recipe` `t`
INNER JOIN `recipe2category` `categories_categories` ON (`t`.`id`=`categories_categories`.`recipe_id`)
INNER JOIN `category` `categories` ON (`categories`.`id`=`categories_categories`.`category_id`)
WHERE (categories.url = 'google.de')
要在Yii CActiveRecord调用中获取WHERE语句,需要在CDbCriteria或FindAll()参数中添加“条件”或“比较”。看到和
例如:
$Criteria = new CDbCriteria;
$Criteria->with = array(
'categories' => array(
'joinType' => 'INNER JOIN'
),
);
$Criteria->condition = 'categories.url = :url';
$Criteria->params = array(
':url' => 'google.de',
);
$Recipes = Recipe::model()->findAll($Criteria);
但要使代码正常工作,您需要我清理的db表和模型:
TABLE recipe - id, name, description
TABLE recipe2category - category_id, recipe_id
TABLE category - id, name, url
Model Recipe.php:
<?php
class Recipe extends CActiveRecord
{
public static function model($className=__CLASS__)
{
return parent::model($className);
}
public function tableName()
{
return 'recipe';
}
public function relations()
{
return array(
'categories' => array(self::MANY_MANY , 'RecipeCategory', 'recipe2category(recipe_id,category_id)'),
);
}
}
?>
Model RecipeCategory.php:
<?php
class RecipeCategory extends CActiveRecord
{
public static function model($className=__CLASS__)
{
return parent::model($className);
}
public function tableName()
{
return 'category';
}
public function relations()
{
return array(
'recipes' => array(self::MANY_MANY , 'Recipe', 'recipe2categoy(category_id,recipe_id)'),
);
}
}
?>
希望这有用。您是否在phpmyadmin中运行了此查询?否。这只是一个示例。我只想表明,我需要“在哪里”子表。你的问题到底是什么?您的查询中是否有任何错误?抱歉,我忘了写我想用活动记录实现这一点。请发布您的Yii PHP模型(必须定义它们之间的关系)