Tips for locating documents by their ID within an array of IDs retrieved from a different schema

I am currently dealing with 2 mongoose Schemas structured like this:

 var RecipeSchema = new Schema({
      type: String,
      version: String,
      data:  [{type: Schema.ObjectId, ref: 'Data'}]
  });
  var Recipe = mongoose.model("Recipe", RecipeSchema);

 var DataSchema = new Schema({
     ex1: String,
     ex2: String,
     ex3: String
 });
 var Data = mongoose.model("Data", DataSchema);

If I have a "selected" recipe in a function, how can I use Data.find() to filter only the Data items with IDs matching those stored in the data array of the selected recipe?

node.jsexpressvue.jsmongoosemongoose-schema

Answer №1

When working with the chosen recipe called 'recipe', simply use the following code:

recipe.populate('data', function (error, populatedRecipe) {
    // The array of data objects will be stored in populatedRecipe.data instead of just _ids
  });

Please note that this method may not be effective if the selected recipe is lean or not a mongoose document.

Answer №2

Resolve field data type:

data: {
  type: [Schema.Types.ObjectId],
  ref: 'RecipeData',
  default: []
}

Example of Usage:

const Recipe = mongoose.model('Recipe');

router.get('/recipes', async (req, res) => {
  try {
    const recipesList = await Recipe.find({}).populate('data').lean();
    res.status(200).send(recipesList);
  }
  catch (error) {
    res.status(500).send({message: error.message});
  }
});

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