eloquent

问题 I have created a model in Laravel. class deals extends Model { // protected $table = 'tbl_deal'; } Now I want to use this model to retrieve data in my Controller. However, the data extracted from this model also needs to be constrained by a column in another table. Below is the basic schema tbl_deal deal_id merchant_id deal_text tbl_merchant merchant_id merchant_url_text My current Controller has the following code to extract all deals from deals model. $deals = deals::all(); I want to

问题 I'm fairly new to Laravel having come over from Codeigniter and for the most part I really like it, but I really can't get my head around Eloquent. If I want to do a simple query like this: SELECT * FROM site INNER JOIN tweeter ON tweeter.id = site.tweeter_id I try doing something like this (with a "belongs to"): $site = Site::with('tweeter')->find($site_id); But now I have two queries and an IN() which isn't really needed, like so: SELECT * FROM `site` WHERE `id` = '12' LIMIT 1 SELECT * FROM

问题 How can I use paginate function from Eloquent in Slim 3 project using twig ? This is in my controller : $posts = Sound::paginate(2); $this->container->view->render($response, 'admin/sounds/index.twig', [ 'posts' => $posts ]); This is the view : {{ posts.links() }} But it doesn't work as well as I expected : Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in **PATH_TO_PROJECT**\vendor\illuminate\pagination\AbstractPaginator.php on line 412 Fatal

问题 I have 2 entities which are related using a relationship table (ManyToMany) And then I have a pricing table which has pricing information for a service of a hospital. This table can have different pricing for the same service if the hospital linked to the service is different. hospitals: id name services: id name hospital_service: hospital_id service_id service_pricing: id hospital_id service_id weight_range_id LH_price SH_price service_duration: id hospital_id service_id weight_range_id LH

问题 I have various relationships within my Eloquent Models that look like this: public function main_image() { return $this->hasOne(Media::class, 'id', 'main_image_id'); } However, it will run a SQL query if the main_image_id is null or 0, so I end up with a number of queries like this: select * from `media` where `media`.`id` is null and `media`.`id` is not null limit 1 Which obviously will not return anything, but still wastes resources. Is there any way of automatically checking for that?

问题 I'm updating a Rental that belongsTo a Location, and I can fill and persist the Rental data, but when I fill the location relationship data retrieved through eager loading if I try to save(), update(), or push(); It isn't persisted to the database. According to the docs push() should work as it apparently persists relationships. Update Action public function update($id, RentalUpdateRequest $request) { // Eager load the rental with relationships $Rental = Rental::with('location')->find($id); /

问题 I have 3 Tables Model Url class Url extends Model { public function users(){ return $this->belongsToMany(User::class); } public function url_status(){ return $this->hasMany(UrlStatus::class); } } Model UrlStatus class UrlStatus extends Model { public function url() { return $this->belongsTo(Url::class); } } Model User class User extends Authenticatable { use Notifiable, SoftDeletes, HasRoles; public function urls(){ return $this->belongsToMany(Url::class); } } In my controller I'm querying :

问题 For an online competition with the goal of photographing certain objects I've got users uploading pictures of objects , where the objects have a category and a subcategory . A user's dashboard should look something like this: ------------------------------------------------ | Category | ------------------------------------------------ | ----------------------------------------- | | | Subcat. | Subcat. | | | |------------------|--------------------| | | |Object1 | Object2 | Object1 | Object2 |

问题 Eloquent $staffGroup = StaffGroup::where('id', $id) ->with('staffGroupRight') ->first(); In StaffGroup Model : public function staffGroupRight() { return $this->hasMany('Modules\Staff\Http\Models\StaffGroupRight'); } what i have does is, public function staffGroupRight() { return $this->hasMany('Modules\Staff\Http\Models\StaffGroupRight')->take(5); } but it gives total 5 rows for all staff_group but i want it to limit for one staff_group For example There are 10 staff_group then it gives 5

问题 I'm using Eloquent for database handling, when I update a record with update method created_at time stamp is changed how to prevent this from happening ? $post = Post::update([ 'name' => $name ]); updated_at timestamp is working perfectly 回答1: In case you don't have any custom settings in your model. You can update record like this: $id = 5; // here put id of record you want to update $post = Post::findOrFail($id); $post->name = $name; $post->save(); Using this code only name should be