How do you wrap Laravel Eloquent ORM query scopes in parentheses when chaining?

问题

In Eloquent, I'd like to generate this query:

SELECT * FROM table WHERE a=1 AND ( b=2 OR c=3 );

But I seem to be generating this query instead:

SELECT * FROM table WHERE a=1 AND b=2 OR c=3;

Here is my implementation and code:

$result = Model::aIsOne()->bIsTwoOrCIsThree()->get();

Model contains:

function scopeAIsOne($query) {
    return $query->where('a', 1);
}

function scopeBIsTwoOrCIsThree($query) {
    return $query->where('b', 2)->orWhere('c', 3);
}

Thanks for any help. I've searched through the docs including Advanced Wheres to no avail.

回答1:

Did you test whereRaw()?

so your function should look like:

function scopeIsFeaturedOrIsBlogPost($query) {
    return $query->whereRaw('( isFeatured = "true" OR type = "blogPost" )');
}

ps. this is untested

回答2:

You can generate parentheses by passing a callback function to where().

Model::where('a',1)->where(function($query) {
    $query->where('b', 2)->orWhere('c',3);
})->get();

回答3:

SEE EDIT FOR FINAL ANSWER

Better than raw, use orWhere with a closure:

$model = Model::whereAIsOne()->orWhere(function($query) {
    $query->where('b', 1)->where('c', 1);
})->get();

The really unfortunate thing (and the way I ended up at this post) is that the second $query used in the closure is an instance of \Illuminate\Database\Query\Builder rather than \Illuminate\Database\Eloquent\Builder - this means that you can't use the model scopes within that closure, because Query\Builder instances don't have a reference to a model.

That said, I still think this is much more ORM-like and useful as a developer.

EDIT

Took a while to figure out, but this will work if you want to use your scopes as well:

$model = Model::whereAIsOne()->orWhere(function($query) {
    $this->newEloquentBuilder($query)->setModel($this)->whereBIsOneAndCIsOne();
})->get();

I'm actually creating a fourth scope in my code that encompasses all of this, so the $this might not work in this context - however, I find that scoping for my models is one of the most important parts of building a good system.

This definitely should be built into Eloquent - the engine has a good start, but so many features are missing.

回答4:

I'm a little late to the party, but wouldn't the most logical way be to wrap the where in a Closure?

    Model::where('a', '=', 1)
            ->where(function($query) {
                    $query->where('b', '=', 2)
                    ->orWhere('c', '>', 3);
    })
    ->get();

来源：https://stackoverflow.com/questions/20914650/how-do-you-wrap-laravel-eloquent-orm-query-scopes-in-parentheses-when-chaining

标签

laravel

laravel-4

eloquent