Querying Relationships in Laravel 5.2 - laravel-5.1

Question

I am having issues trying to query an Eloquent relationship.
I have 2 tables
tbl_deals
id
deal_id
merchant_id
tbl_merchants
id
merchant_id
merchant_url_text
I defined a deal model as
class deal extends Model
{
public function merchant() {
return $this->hasOne('App\merchant', 'merchant_id', 'merchant_id');
}
}
Now, I want to query all deals based where merchant_url_text = a variable in my controller
Here's what I am trying
$deals = deal::with('merchant')->get(); //Retrieving all the deals with merchants
If I return $deals its giving me all deals with merchant relationship.
How do I constraint the deals by saying where merchant_url_text = $variable
I am trying
return $deals->where('merchant_url_text', $merchant_url_text)->get();
but it is giving me an error saying :
"Missing argument 1 for Illuminate\Support\Collection::get(), called in ..."
I tried to lookup the documentation for querying relationships in Laravel Docs. It talks about this example
$user = App\User::find(1);
$user->posts()->where('active', 1)->get();
In this case, its trying to get the first user and finding corresponding posts related to the user.
In my case I want to filter from all deals, the deals that have merchant_url_text = a specific variable in my controller.
Any help on how I can achieve this?
Thanks

Answer 1

Try the following code :
$specific_merchant_url_text = "i don't know";
$deals_with_specific_merchant_url_text = [];
$deals = deal::with('merchant')->get();
foreach($deals as $deal)
if( $deal->merchant->merchant_url_text==$specific_merchant_url_text)
array_push($deals_with_specific_merchant_url_text, $deal);
So you get array of deals with specific merchant url text in deals_with_specific_merchant_url_text.
Another approach using DB object :
$deals = DB::table('deals')
->join('merchants', 'deals.merchant_id', '=', 'merchants.id')
->select('deals.*')
->where('merchants.merchant_url_text', $merchant_url_text)
->get();
Yours with raw :
$deals = deal::selectRaw('tbl_deals.*')
->Join('merchants','deals.merchant_id','=','merchants.merchant_id')
->where('merchants.merchant_url_text', '=', $merchant_url_text) ->get();
Hope this helps.

Answer 2

With takes a callback. This will bring back all deals but only eager load merchants that match.
$deals = Deal::with(['merchant' => function ($query) use ($url_text){
return $query->where('merchant_url_text', $url_text);
}])->get();
Flip-side: if you only want deals with a matching merchant, use where has.
$deals = Deal::whereHas('merchant', function ($query) use ($url_text){
return $query->where('merchant_url_text', $url_text);
})->get();
If you want both, chain them:
$deals = Deal::whereHas('merchant', function ($query) use ($url_text){
return $query->where('merchant_url_text', $url_text);
})->with(['merchant' => function ($query) use ($url_text){
return $query->where('merchant_url_text', $url_text);
}])->get();
I capitalized deal because it's standard. It wasn't capitalized in your example.

Answer 3

You can use query builder join query .
DB::table('tbl_merchants')
->join('tbl_deals', 'tbl_merchants.merchant_id', '=','tbl_deals.merchant_id')
->where('tbl_merchants.merchant_url_text',$merchant_url_text)
->get();