Initial support for '&&' operator used for arrays in PostgreSQL.

[dorantor]

Very basic support. Not very convenient, because at this level, all array conversion have to be done in app:

        $items = $this->query('item')
            ->where('categories_ids', '&&', '{' . $category->id() . '}')
            ->find()
        ;

or

        $items = $this->query('item')
            ->where('categories_ids', '&&', '{' . implode(',' $ids) . '}')
            ->find()
        ;

But it is already working and allows to use pgsql arrays. Ideally, it should be

        $ids = array(1, 2, 3);
        $items = $this->query('item')
            ->where('categories_ids', '&&', $ids)
            ->find()
        ;

But there are two major stoppers for me:

• arrays in pgsql could be nested(but I can avoid this, saying that I will deal only with "flat" arrays)
• more importantly, I don't know where to put this conversion. And this conversion should be two way and support should be not only for && operator, but also for select, insert, update, delete and, probably, somewhere else also.

As an option, I can start with baby steps. Add conversion just for && operator, for example. But I need some guidance here :)

[dracony]

Ok, so basically the correct way to do this is:

1. change $addtionalOperators to define a new operatorgroup:

protected $additionalOperators = array(
    'compare'   => array('>>', '>>=', '<<', '<<=', '&&',),
    'array'   => array('in array', 'not in array') // define an 'array' operator group with 2 operators
);

2. Then you want to add a method to handles this operator group. It has to be called 'parse' + nameOfTheGroup:

    protected function parseArray($field, $operator, $values)
    {
        $value = $this->singleValue($values, $operator); // get the parameter
        $operator = $operator == 'in array' ? '&&' : '!&&'; // convert text operator to actual postgre operator
         // idk if !&& actually exists or not, but just an example
        $expr = $this->prefix($field, $operator);
        $expr->sql.= '{' . implode(',' $ids) . '}';
        return $expr;
    }

Smth like this :)

[dorantor]

Finally found some time to finish this. Now it should work in "ideal" fashion:

        $ids = array(1, 2, 3);
        $items = $this->query('item')
            ->where('categories_ids', '&&', $ids)
            ->find()
        ;

Haven't tried in my projects yet, but tests are passing :)
Important note. I need it only with int s, so this is the only type supported in arrays for now.