Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Fetch elements filtering by association but include all associations for matched elements

See original GitHub issue

models associations:

Picture.belongsToMany(Tag, { through: 'fee_picture_tag' });
Tag.belongsToMany(Picture, { through: 'fee_picture_tag' });

query:

const pictures = Picture.findAll({
  distinct: true,
  include: [
    {
      model: Tag,
      attributes: ['id', 'name'],
    },
  ],
});

result:

[
    {
        "id": 1,
        "tags": [
            {
                "id": 1,
                "name": "烹饪",
            },
            {
                "id": 6,
                "name": "书籍",
            }
        ]
    },
    {
        "id": 2,
        "tags": [
            {
                "id": 3,
                "name": "烘焙",
            },
            {
                "id": 6,
                "name": "书籍",
            }
        ]
    },
    {
        "id": 3,
        "tags": [
            {
                "id": 2,
                "name": "花艺",
            },
            {
                "id": 6,
                "name": "书籍",
            }
        ]
    }
]

I need to filter out the pictures with the tag by id = 3, the query is

const pictures = Picture.findAll({
  include: [
    {
      model: Tag,
      attributes: ['id', 'name'],
      through: {
        where: {
          tagId: 3,
        },
      },
    },
  ],
});

actual

[
    {
        "id": 1,
        "tags": []
    },
    {
        "id": 2,
        "tags": [
            {
                "id": 3,
                "name": "烘焙",
            }
        ]
    },
    {
        "id": 3,
        "tags": []
    }
]

expect

[
    {
        "id": 2,
        "tags": [
            {
                "id": 3,
                "name": "烘焙",
            },
            {
                "id": 6,
                "name": "书籍",
            }
        ]
    },
]

How to implement this query? thank you!