{"id":5211,"date":"2022-08-27T07:38:43","date_gmt":"2022-08-27T02:08:43","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-doctrine-entities-relations-confusing\/"},"modified":"2022-08-27T07:38:43","modified_gmt":"2022-08-27T02:08:43","slug":"solved-doctrine-entities-relations-confusing","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-doctrine-entities-relations-confusing\/","title":{"rendered":"[Solved] Doctrine Entities Relations confusing"},"content":{"rendered":"

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The classes can be created like my example below.
\nI based this on @rafix ‘s answer, but there were some problems.<\/p>\n

Also, you don’t have<\/strong> to name your classes in the singular like @rafix indicated, you can name them however you want. But, it’s much better practive to do it that way and make your code much easier to read and support.<\/p>\n

For example: If you have a class called “Country”, then you know a country has “cities”, and each one of those “cities” is a “City”. So the class refers to the individual object.<\/p>\n

Here is the changes I suggest:<\/p>\n

class Country\n{\n    \/**\n     * @ORM\\Column(name=\"country_id\", type=\"integer\")\n     * @ORM\\Id\n     * @ORM\\GeneratedValue(strategy=\"AUTO\")\n     *\/\n   private $country_id;\n\n    \/**\n     * @ORM\\Column(name=\"flag\", type=\"string\", length=100, nullable=true)\n     *\/\n    private $flag;\n\n   \/**\n    * @ORM\\OneToMany(targetEntity=\"Region\", mappedBy=\"country\")\n    *\/\n   private $regions = null;\n\n   public function __construct() {\n       $this->regions = new ArrayCollection();\n\n   }\n}\n<\/code><\/pre>\n
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class Region\n{\n    \/**\n     * @ORM\\Column(name=\"region_id\", type=\"integer\")\n     * @ORM\\Id\n     * @ORM\\GeneratedValue(strategy=\"AUTO\")\n     *\/\n    private $region_id;\n\n    \/**\n     * @ORM\\Column(name=\"name\", type=\"string\", length=100)\n     *\/\n    private $name;\n\n    \/**\n     * @ORM\\ManyToOne(targetEntity=\"Country\", inversedBy=\"regions\")\n     * @ORM\\JoinColumn(name=\"region_country_id\", referencedColumnName=\"country_id\")\n     *\/\n    private $country;\n\n    \/**\n     * @ORM\\OneToMany(targetEntity=\"City\", mappedBy=\"region\")\n     *\/\n    private $cities = null;\n\n    public function __construct() {\n        $this->cities = new ArrayCollection();\n    }\n}\n<\/code><\/pre>\n
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class City\n{\n    \/**\n     * @ORM\\Column(name=\"city_id\", type=\"integer\")\n     * @ORM\\Id\n     * @ORM\\GeneratedValue(strategy=\"AUTO\")\n     *\/\n    private $city_id;\n\n    \/**\n     * @ORM\\ManyToOne(targetEntity=\"Region\", inversedBy=\"cities\")\n     * @ORM\\JoinColumn(name=\"region_id\", referencedColumnName=\"region_id\")\n     *\/\n    private $region;\n\n    \/**\n     * @ORM\\Column(name=\"name\", type=\"string\", length=100)\n     *\/\n    private $name;\n}\n<\/code><\/pre>\n
Notice, I renamed each of the “id” s in each of the classes so you would know that it is the ID for that particular Entity. For example: The Country class has a “country_id”.<\/p>\n
Also, since for example, the Country class has “regions”, you need to declare the array as “null”. Make sure you have the proper addRegion<\/code> to add regions to the array when you finish your code.<\/p>\n<\/p><\/div>\n
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            <\/span> <\/p><\/div>\n<\/div>\n
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solved Doctrine Entities Relations confusing <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] The classes can be created like my example below. I based this on @rafix ‘s answer, but there were some problems. Also, you don’t have to name your classes in the singular like @rafix indicated, you can name them however you want. But, it’s much better practive to do it that way and make … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[1276,580],"class_list":["post-5211","post","type-post","status-publish","format-standard","hentry","category-solved","tag-doctrine-orm","tag-symfony"],"yoast_head":"\n[Solved] Doctrine Entities Relations confusing - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-doctrine-entities-relations-confusing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Doctrine Entities Relations confusing - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] The classes can be created like my example below. 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