cordata_works_multiple_forms.js

[
  {
    $match: {
      data: {
        $exists: true,
      },
    },
  },
  {
    $unwind: {
      path: "$data.genres",
    },
  },
  {
    $match: {
      "data.genres.isForm": true,
    },
  },
  {
    $group: {
      _id: "$data.id",
      title: {
        $first: "$data.title.mainTitle",
      },
      forms: {
        $addToSet: "$data.genres.name.nb",
      },
    },
  },
  {
    $match: {
      "forms.1": {
        $exists: true,
      },
    },
  },
  {
    $addFields: {
      forms: {
        $sortArray: {
          input: "$forms",
          sortBy: 1,
        },
      },
    },
  },
]