A JOIN With Additional Conditions Using Query Builder or Eloquent

Question

I\'m trying to add a condition using a JOIN query with Laravel Query Builder.

Answer 1

$results = DB::table('rooms')
                     ->distinct()
                     ->leftJoin('bookings', function($join)
                         {
                             $join->on('rooms.id', '=', 'bookings.room_type_id');
                             $join->on('arrival','>=',DB::raw("'2012-05-01'"));
                             $join->on('arrival','<=',DB::raw("'2012-05-10'"));
                             $join->on('departure','>=',DB::raw("'2012-05-01'"));
                             $join->on('departure','<=',DB::raw("'2012-05-10'"));
                         })
                     ->where('bookings.room_type_id', '=', NULL)
                     ->get();

Not quite sure if the between clause can be added to the join in laravel.

Notes:

• DB::raw() instructs Laravel not to put back quotes.
• By passing a closure to join methods you can add more join conditions to it, on() will add AND condition and orOn() will add OR condition.

Answer 2

I am using laravel5.2 and we can add joins with different options, you can modify as per your requirement.

Option 1:    
    DB::table('users')
            ->join('contacts', function ($join) {
                $join->on('users.id', '=', 'contacts.user_id')->orOn(...);//you add more joins here
            })// and you add more joins here
        ->get();

Option 2:
    $users = DB::table('users')
        ->join('contacts', 'users.id', '=', 'contacts.user_id')
        ->join('orders', 'users.id', '=', 'orders.user_id')// you may add more joins
        ->select('users.*', 'contacts.phone', 'orders.price')
        ->get();

option 3:
    $users = DB::table('users')
        ->leftJoin('posts', 'users.id', '=', 'posts.user_id')
        ->leftJoin('...', '...', '...', '...')// you may add more joins
        ->get();

Answer 3

The sql query sample like this

LEFT JOIN bookings  
    ON rooms.id = bookings.room_type_id
    AND (bookings.arrival = ?
        OR bookings.departure = ?)

Laravel join with multiple conditions

->leftJoin('bookings', function($join) use ($param1, $param2) {
    $join->on('rooms.id', '=', 'bookings.room_type_id');
    $join->on(function($query) use ($param1, $param2) {
        $query->on('bookings.arrival', '=', $param1);
        $query->orOn('departure', '=',$param2);
    });
})

Answer 4

You can replicate those brackets in the left join:

LEFT JOIN bookings  
               ON rooms.id = bookings.room_type_id
              AND (  bookings.arrival between ? and ?
                  OR bookings.departure between ? and ? )

is

->leftJoin('bookings', function($join){
    $join->on('rooms.id', '=', 'bookings.room_type_id');
    $join->on(DB::raw('(  bookings.arrival between ? and ? OR bookings.departure between ? and ? )'), DB::raw(''), DB::raw(''));
})

You'll then have to set the bindings later using "setBindings" as described in this SO post: How to bind parameters to a raw DB query in Laravel that's used on a model?

It's not pretty but it works.

Answer 5

There's a difference between the raw queries and standard selects (between the DB::raw and DB::select methods).

You can do what you want using a DB::select and simply dropping in the ? placeholder much like you do with prepared statements (it's actually what it's doing).

A small example:

$results = DB::select('SELECT * FROM user WHERE username=?', ['jason']);

The second parameter is an array of values that will be used to replace the placeholders in the query from left to right.

Answer 6

If you have some params, you can do this.

    $results = DB::table('rooms')
    ->distinct()
    ->leftJoin('bookings', function($join) use ($param1, $param2)
    {
        $join->on('rooms.id', '=', 'bookings.room_type_id');
        $join->on('arrival','=',DB::raw("'".$param1."'"));
        $join->on('arrival','=',DB::raw("'".$param2."'"));

    })
    ->where('bookings.room_type_id', '=', NULL)
    ->get();

and then return your query

return $results;