![]() The whenLoaded method may be used to conditionally load a relationship. ![]() Ultimately, this makes it easier to avoid "N+1" query problems within your resources. I've tried to use a ->selectRaw(concat.) and multiple other things, nothing would work. This allows your controller to decide which relationships should be loaded on the model and your resource can easily include them only when they have actually been loaded. The problem seems to be the concatination in the join function. In addition to conditionally loading attributes, you may conditionally include relationships on your resource responses based on if the relationship has already been loaded on the model. Now, demonstrates laravel eloquent join with the following examples. ![]() Furthermore, it should not be used within arrays with numeric keys that are not ordered sequentially. Laravel JOIN eloquent returns all rows from the both table, if there are matches in the both table. The mergeWhen method should not be used within arrays that mix string and numeric keys. Resources extend the Illuminate\Http\Resources\Json\JsonResource class:Īgain, if the given condition is false, these attributes will be removed from the resource response before it is sent to the client. By default, resources will be placed in the app/Http/Resources directory of your application. To generate a resource class, you may use the make:resource Artisan command. Currently i am doing this: query DB::table ('caravan') ->join ('type','caravan.typeid', '', 'type.id') ->join ('category','caravan.categoryid. so that i have have the returned object as my model class rather than a stdClass. How to create join query for multiple models with separate conditions in laravel Eloquent ORM. I'm learning a bit of Laravel coming over from Symfony, and i'm a little confused with how joins work with eloquent. Laravels database query builder provides a convenient, fluent interface to creating and running database queries. Of course, you may always convert Eloquent models or collections to JSON using their toJson methods however, Eloquent resources provide more granular and robust control over the JSON serialization of your models and their relationships. Laravel Eloquent inner join with multiple conditions. Eloquent's resource classes allow you to expressively and easily transform your models and model collections into JSON. For example, you may wish to display certain attributes for a subset of users and not others, or you may wish to always include certain relationships in the JSON representation of your models. When building an API, you may need a transformation layer that sits between your Eloquent models and the JSON responses that are actually returned to your application's users.
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