Increment columns in laravel

问题

Is there a way to increment more than one column in laravel?

Let's say:

DB::table('my_table')
->where('rowID', 1)
->increment('column1', 2)
->increment('column2', 10)
->increment('column3', 13)
->increment('column4', 5);

But this results to:

Call to a member function increment() on integer

I just want to find an efficient way to do this using the given functions from laravel. Thanks. Any suggestions will do.

回答1:

There is no existing function to do this. You have to use update():

DB::table('my_table')
   ->where('rowID', 1)
   ->update([
       'column1' => DB::raw('column1 + 2'),
       'column2' => DB::raw('column2 + 10'),
       'column3' => DB::raw('column3 + 13'),
       'column4' => DB::raw('column4 + 5'),
   ]);

回答2:

For future reference in 5.2 it has been made do able by doing the following

You may also specify additional columns to update during the operation:

DB::table('users')->increment('votes', 1, ['name' => 'John']);

Source: https://laravel.com/docs/5.2/queries#updates

回答3:

Increments and Decrements in Laravel Eloquent Model

Add to cart option is one of the most important functions in e-commerce websites. The tricky part is getting the number of items in the cart to display on the cart icon. The predominant approach to get this done is using the increment and decrement function on Laravel. This also facilitates the addition or removal of a product from your cart. The way to implement this function is ,

$user = User::find(‘517c43667db388101e00000f’);
$user->cart_count++;
// $user->cart_count--; // for decrement the count
$user->save()

An alternate and easier way is,

$user = User::find($article_id);
$user->increment('cart_count');

Also these will work:

$user->increment('cart_count');// increase one count
$user->decrement('cart_count'); // decrease one count
$user->increment('cart_count',10); // increase 10 count
$user->decrement('cart_count',10); // decrease 10 count

回答4:

First off, the result of increment is an integer according to the documentation: http://laravel.com/api/4.2/Illuminate/Database/Query/Builder.html

So you would have to do a call for each increment:

DB::table('my_table')
->where('rowID', 1)
->increment('column1', 2);
DB::table('my_table')
->where('rowID', 1)
->increment('column2', 10);
DB::table('my_table')
->where('rowID', 1)
->increment('column3', 13);
DB::table('my_table')
->where('rowID', 1)
->increment('column4', 5);

I'm unable to find any quicker solution, unless you want to solve it with a raw update query command.

Also your example code will probably generate an error as you've closed the statement with ; and continue with a new ->increment call on the next line.

回答5:

Now in laravel 5.7 laravel query builder, increment and decrement, it can be done easily.

Model::where('id', "rowID")->increment('columne1');`

or you can use DB

`DB::table("my_table")->where('id', "rowID")->increment('column1');

来源：https://stackoverflow.com/questions/29816123/increment-columns-in-laravel

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laravel

increment