如何在 mongodb php 中封装多个 $in 查询

Question

Here PRODUCT_NAME and BRAND_NAME are two different columns from same document. And I want to apply a filter on the selected product and brand names.

My array is something like this

Array
(
    [PRODUCT_NAME] => Array
        (
            [$and] => Array
                (
                    [$in] => Array
                        (
                            [0] => Product1
                            [1] => Product2
                        )

                )

        )

    [BRAND_NAME] => Array
        (
            [$and] => Array
                (
                    [$in] => Array
                        (
                            [0] => Brand1
                        )

                )

        )

)

Answer 1

The way to do this with mongodb ( assuming last version ) is to use mongodb aggregation and in particular $unwind

So as example in your case:

db.yourcollection.aggregate( [
  { $unwind : "$firstattribute" } , // 1
  { $unwind : "$PRODUCT_NAME" },    // 2
  { $unwind : "$BRAND_NAME" },      // 3
] )

Now some explanation:

1. because in your example, you provided an array, you have to unwind it, if is not so, please remove
2. here you unwind product name array
3. and here brand name

Note: I can provide a better (and runnable) solution with a real example ( a json with at least 2 elements in each array