I have a recipe blog site, where every single recipe have comments. Every comments saving into the comments collection, but when i push the comments to the right recipe, than only saving the ObjectID. Here is my code:

Recipe model

const { Double } = require('bson');
const mongoose = require('mongoose');

const recipeSchema = new mongoose.Schema({
    name: {
        type: String,
        required: 'This field is required.'
    },
    description: {
        type: String,
        required: 'This field is required.'
    },
    quantity: {
        type: Array,
        required: 'This field is required.'
    },
    ingredients: {
        type: Array,
        required: 'This field is required.'
    },
    comments: [
        {
            type: mongoose.Schema.Types.ObjectId,
            ref: 'Comment'
        }
    ],
    recipe_id: {
        type: String,
    }

});

recipeSchema.index({ name: 'text', description: 'text' });
const Recipe = module.exports = mongoose.model('Recipe', recipeSchema);

Comment Model

const commentSchema = new mongoose.Schema({
    username: {
        type: String,
        required: 'This field is required.'
    },
    comment: {
        type: String,
        required: 'This field is required.'
    },
    recipe_id: {
        type: String
    }
});

Routes

router.get('/', recipeController.homepage);
router.get('/recipe/:id', recipeController.exploreRecipe );
router.get('/categories/:id', recipeController.exploreCategoriesById);
router.get('/categories', recipeController.exploreCategories);
router.get('/submit-recipe', recipeController.submitRecipe);
router.post('/submit-recipe', recipeController.submitRecipeOnPost);
router.post('/recipe/:id/comments', recipeController.CommentRecipeOnPost);

Controller

module.exports.CommentRecipeOnPost = async(req, res) => {
    const comment = new Comment({
      username: req.body.username,
      comment: req.body.comment
    });
    comment.save((err, result) => {
      if (err){
        console.log(err)
      }else {
        Recipe.findById(req.params.id, (err, post) =>{
          if(err){
            console.log(err);
          }else{
            post.comments.push(result);
            post.save();

            console.log('====comments=====')
            console.log(post.comments);
            res.redirect('/');
          }
        })
      }
    })
   }

I tried with populate and another methods, but no one worked, after a lots of hour programming i done with these, that i can save only the ObjectId-s.

CodePudding user response：

This's because you define comments at recipe schema as an ObjectId and that's right, if you want to get full comment parameters you will populate the record

const recipe = await Recipe.findOne({ _id: "recordId"}).populate("posts") 

this will return all comments details

{  name: "Fitness recipe", description: "Fitness recipe to loss 10kg in 10 days only", comments: [ {_id: "recordId", username: "Smith June", comment: "That's awesome"}]}

if you need to save the whole document as an array of objects, not just the id so you can make schema like that

const recipeSchema = new mongoose.Schema({
    name: {
        type: String,
        required: 'This field is required.'
    },
    description: {
        type: String,
        required: 'This field is required.'
    },
    quantity: {
        type: Array,
        required: 'This field is required.'
    },
    ingredients: {
        type: Array,
        required: 'This field is required.'
    },
    comments: [
        { username: String, comment: String }
    ],
    recipe_id: {
        type: String,
    }

})

and in this case, you won't have any relations, you can list recipe comments easily.