Get Specific Columns Using "With()" Function in Laravel Eloquent

Get Specific Columns Using “With()” Function in Laravel Eloquent

Well I found the solution. It can be done one by passing a closure function in with() as second index of array like

Post::query()
    ->with(['user' => function ($query) {
        $query->select('id', 'username');
    }])
    ->get()

It will only select id and username from other table. I hope this will help others.

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Remember that the primary key (id in this case) needs to be the first param in the
$query->select() to actually retrieve the necessary results.*

How we get specific columns from multiple relations using With() in Laravel

to make Laravel able to load the relation, you should select the foreign key that responsible for that relation

Questions::with(array(
                'questionCategory' => function($query) {$query->select('cat_id','cat_value');},
                'ans_options' => function($query1) {$query1->select('ac_id','ac_choiceTxt'
,'ac_quest_id');}))->get();

just add 'ac_quest_id' to your select.

Laravel eloquent creating a WHERE condition if and only if the table column has a specific value

I think what you want to do is this :

->where(function($q) {
    $q->where('column_a', '=', 'paid')
      ->where('status', '!=', 'failed')
      ->where('status', '!=', 'cancelled');
})
->orWhere(function($q) {
    $q->where('column_a', '!=', 'notpaid')
       ->where('status', '!=', 'authorized');
})

Laravel with([]) select only some columns of the relation

Like this:

$order = Order::with([
    'company:id,name,size',
    'complaints:id,name,body',
    'person',     
    'items',  
    'items.product:id,name,price',
    'items.product.stockManagement',
    'status:id',
    'items.product.media',
    'items.product.mainProduct',
    'items.product.mainProduct.media'
])->findOrFail($id);

The documentation is very brief about the loading of specific columns (you even have to scroll down a bit to the heading that says "Eager Loading Specific Columns").

You may not always need every column from the relationships you are retrieving. For this reason, Eloquent allows you to specify which columns of the relationship you would like to retrieve:

$books = App\Book::with('author:id,name')->get();

Note:

When using this feature, you should always include the id column and any relevant foreign key columns in the list of columns you wish to retrieve.

Laravel Eager Loading - Load only specific columns

Make use of the select() method:

public function car() {
    return $this->hasOne('Car', 'id')->select(['owner_id', 'emailid', 'name']);
}

Note: Remember to add the columns assigned to the foreign key matching both tables. For instance, in my example, I assumed a Owner has a Car, meaning that the columns assigned to the foreign key would be something like owners.id = cars.owner_id, so I had to add owner_id to the list of selected columns;

How to select specific columns in laravel eloquent

You can do it like this:

Table::select('name','surname')->where('id', 1)->get();

How to exclude certains columns while using eloquent

If you only need to hide attributes from your model's array or JSON representation, you may use one or both approaches:

• Add the
  $hidden property to your model
  

  class User extends Model
  {
      /**
       * The attributes that should be hidden for arrays.
       */
       protected $hidden = ['password'];
  }
  

• Use the
  makeHidden
  function
  

  $users = $users->makeHidden(['address', 'phone_number']);
  

See other answers for more details... But sometimes you don't want to load huge data (geospatial, html, logs...) into your application, it will be slow and take more memory. OP asked for an SQL query hence my answer, but most of the time it's more convenient to only hide the data from the JSON response.

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AFAIK there is no build in option in SQL to exclude columns explicitly, so Laravel can't do it. But you can try this trick

Update

Another trick is to specify all columns in your model (or use an extra query to get all columns using $this->getTableColumns() from this answer, it can also be cached after each migration to avoid two queries) then add a local scope function

// The below code requires you to define all columns in $columns.
// A better approach is to query the schema of the table and cache it after each  
// migration, for more details: https://stackoverflow.com/a/56425794/3192276

protected $columns = ['id','pseudo','email'];

public function scopeExclude($query, $value = []) 
{
    return $query->select(array_diff($this->columns, (array) $value));
}

Then you can do :

$users = User::where('gender', 'M')
    ->where('is_active', 1)
    ->exclude(['pseudo', 'email', 'age', 'created_at'])
    ->toArray();

CONCAT columns with Laravel 5 eloquent

You need to wrap your query in DB::raw:

$comp = Component::select(DB::raw("CONCAT('name','id') AS ID"))->get()

Also, note because you are doing your query like this, your model might behave differently, because this select removes all other fields from the select statement.
So you can't read the other fields from your model without a new query. So ONLY use this for READING data and not MODIFYING data.

Also, to make it in a nice list, I suggest you modify your query to:

$comp = Component::select(DB::raw("CONCAT('name','id') AS display_name"),'id')->get()->pluck('display_name','id');
// dump output to see how it looks.
dd($comp);// array key should be the arrray index, the value the concatted value.

Select specific column in laravel eloquent's with method

You also have to select the foreign key column (required for matching the results):

$posts = $request->user()->posts()->with('comments:id,post_id'); 

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