doctrine-orm

问题 I have two entities User and Article with many-to-many relation as Article can have many authors. class User { /** @var string */ public $name; /** @var Collection<Article> */ public $articles; } class Article { /** @var string */ public $title; /** @var Collection<User> */ public $authors; } How I can find all Articles with specified (co)author using DQL? 回答1: Use MEMBER OF expression. Your DQL query could like like SELECT art FROM Article art WHERE :user MEMBER OF art.authors or using query

问题 What is the difference between JOIN ON and JOIN WITH in Doctrine2? I couldn't find any relevant info in the manual. 回答1: ON replaces the original join condition, WITH adds a condition to it. Example : [Album] ---OneToMany---> [Track] Case One DQL FROM Album a LEFT JOIN a.Track t WITH t.status = 1 Will translate in SQL FROM Album a LEFT JOIN Track t ON t.album_id = a.id AND t.status = 1 Case Two DQL FROM Album a LEFT JOIN a.Track t ON t.status = 1 Will translate in SQL FROM Album a LEFT JOIN

问题 What is the difference between JOIN ON and JOIN WITH in Doctrine2? I couldn't find any relevant info in the manual. 回答1: ON replaces the original join condition, WITH adds a condition to it. Example : [Album] ---OneToMany---> [Track] Case One DQL FROM Album a LEFT JOIN a.Track t WITH t.status = 1 Will translate in SQL FROM Album a LEFT JOIN Track t ON t.album_id = a.id AND t.status = 1 Case Two DQL FROM Album a LEFT JOIN a.Track t ON t.status = 1 Will translate in SQL FROM Album a LEFT JOIN

问题 What are the differences between Symfony console command make:migration and doctrine:migrations:diff? 回答1: make:migration will create empty file for you so you can write your custom migration doctrine:migrations:diff will compare your current database schema with entities mappings and if there is difference then it will create migration so you can update you database schema to reflect your entities mappings 回答2: There is no difference between these two commands. make:migration is simply a

问题 What are the differences between Symfony console command make:migration and doctrine:migrations:diff? 回答1: make:migration will create empty file for you so you can write your custom migration doctrine:migrations:diff will compare your current database schema with entities mappings and if there is difference then it will create migration so you can update you database schema to reflect your entities mappings 回答2: There is no difference between these two commands. make:migration is simply a

问题 What are the differences between Symfony console command make:migration and doctrine:migrations:diff? 回答1: make:migration will create empty file for you so you can write your custom migration doctrine:migrations:diff will compare your current database schema with entities mappings and if there is difference then it will create migration so you can update you database schema to reflect your entities mappings 回答2: There is no difference between these two commands. make:migration is simply a

问题 I trying to output an array from the database to the screen. In my entity: /** * @ORM\Column(type="array", nullable=true) */ private $category; In my twig template: {% for category in user.profile.category %} {{ category }} {% endfor %} Error: Array to string conversion in ... Where is my mistake? 回答1: TWIG doesn't know how you want to display your table. By the way, you should consider naming your variable $categories instead of $category , as you table contains several categories. Then try

来源： https://stackoverflow.com/questions/41484488/symfony-doctrine-orderby-and-group-by-distinct

来源： https://stackoverflow.com/questions/41484488/symfony-doctrine-orderby-and-group-by-distinct

来源： https://stackoverflow.com/questions/64775433/symfony-collectiontype-update-entities