relationship

问题 Laravel Eloquent Self Join Parent Child Relationship class Product_category extends Model { // protected $table='PRODUCT_CATEGORIES'; public $timestamps = false; public function getParentCategory() { return $this->hasOne(self::class, 'id', 'parent_id'); }. public function getChildCategories(){ return $this->hasMany(self::class, 'parent_id','id'); } I am able to retrieve all child records of table by making use of getChildeCategories but not able to retrieve Parent of particular category. It

问题 I have an issue understanding pretty well the Relationships, let's go to the point I have 3 tables, with its proper models receipt - id - date items_sold - id - receipt_id - item_id items - id - name The problem I have is that receipt "has many" items through items_sold, but I can't use "hasManyThrough" because eloquent use the wrong "id" of "items_sold", even if I put manually the keys class Receipt extends Eloquent { public function items() { return $this->hasManyThrough('Items', 'ItemsSold

问题 Hi i'm working on a laravel training project . i'm having an issue with models and relationships when i'm trying to get the each product category name . Here is my Product Model <?php namespace App; use Illuminate\Database\Eloquent\Model; class Product extends Model { public function category() { return $this->belongsTo('App\Category'); } } and my Category model <?php namespace App; use Illuminate\Database\Eloquent\Model; class Category extends Model { protected $table = 'categories'; public

问题 I'm trying to get to a ProfileType through my User model, i.e. $user->profile->profiletype; I'm not able to retrieve an object, however. Basically, User hasOne Profile, and Profile belongsTo User and ProfileType. ProfileType hasMany Profile. My table names are users, profiles and profile_types. models/User.php use Cartalyst\Sentry\Users\Eloquent\User as SentryUserModel; class User extends SentryUserModel { /** * Indicates if the model should soft delete. * * @var bool */ protected $softDelete

问题 I have one to many relation - Entry can have many Visits . In my Entry model I have the following methods: public function visits() { return $this->hasMany ('Visit', 'entry_id','id'); } public function visitsCount() { return $this->hasMany('Visit', 'entry_id','id') ->selectRaw('SUM(number) as count') ->groupBy('entry_id'); } In Blade I can get number of visits for my entry using: {{$entry->visits()->count() }} or {{ $entry->visitsCount()->first()->count }} If I want to create accessor for

问题 I have a portlet, which can add/update/delete books and add authors. Moreover, you can choose existing authors when you try to add book. And now I need to show how many books were written by each author in "author" table. How can I do it? Im a newbie in liferay and I even have no idea. It's my service.xml <entity name="Book" local-service="true" remote-service="true" cache-enabled="false"> <column name="bookId" type="long" primary="true" /> <column name="bookName" type="String" /> <column

问题 I'm using kohana v3.3, and i would like to know if there is a possibility to get/save another data in the pivot table or not ? let's take the Auth example : So we have 3 tables (roles, users, roles_users) and i added another column "date" on the pivot table Tables : CREATE TABLE IF NOT EXISTS roles ( id int(11) UNSIGNED NOT NULL AUTO_INCREMENT, name varchar(32) NOT NULL, description varchar(255) NOT NULL, PRIMARY KEY ( id ), UNIQUE KEY uniq_name ( name ) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

问题 I've been looking into this issue for the last day, so I think it's time to ask the question. I created a one-to-many self referencing relation in CoreData to store contacts and group these contacts. Contacts that haven't got a parent actually hold the "section name" of its children. Section name (object without parent) ------------------------------------- Contact 1 Contact 2 Code to save the objects (simplified): //Create Section section = [NSEntityDescription

问题 If I have a User table and a Roles table. What is the usual practice/pattern for adding the relationship ? Do I create an extra column in the User table for the RoleID or do people usually create a Relationships table like so: Relationships Table RelationshipID | UserID | RoleID |... any other relations a user might have for the last bit, as a user you might create an endless amount of different types of things that all need to be related to you... do you instead add the relationship to each

问题 i have installed sfGuardPlugin and created this model: propel: sf_guard_user_profile: _attributes: { phpName: sfGuardUserProfile } id: ~ user_id: { type: integer, foreignTable: sf_guard_user, foreignReference: id, required: true, onDelete: cascade } name: varchar(50) As it is written here, http://www.propelorm.org/wiki/Documentation/1.4/Relationships (see "One-to-one relationships"), It is supposed symfony generates the function sfGuardUser->getSfGuardUserProfile() and sfGuardUserProfile-