Is it possible to execute a MongoDB insert within a Meteor method?

Question

Is it possible to execute a MongoDB insert within a Meteor method?

I've encountered an issue in my Meteor app where a Meteor method takes a collection as a parameter and attempts to run the mongo insert command on that collection to create a new document. The code is set to run every 10 seconds using setInterval.

The collection is defined as:

My_Collection_Name = new Meteor.Collection('my_collection_name');

Server code:

var collection = My_Collection_Name;
var data = [1,2,3,'a','b','c'];
Meteor.call('createDocument', collection, data);

Method:

Meteor.methods({
  createDocument: function(collection, data) {
    collection.insert({
      data: data
    });
  }
});

However, when running the code, the console displays the following error:

I20141030-14:58:06.716(-4)? Exception in setInterval callback: TypeError: Object #<Object> has no method 'insert'

Why is this happening? Can a collection be passed in as a parameter in this context? Any insights would be appreciated. Thank you!

javascript mongodb meteor

Answer 1

Answer №1

The scenario here involves having separate collections on the client and server sides, as detailed further in Understanding Meteor publish/subscribe. It's not advisable to depend solely on the private _collection field. Instead, it's recommended to pass the collection name as a string to Meteor.call, ensuring consistency in variable naming for the collection on the server, and then accessing the collection by its name within the global object on the server:

// on the client:

MyCollection = new Mongo.Collection('record-set-name');  // as defined on the server through .publish()
Meteor.call('createDocument', 'MyCollection', data);

// on the server:
MyCollection = new Mongo.Collection('collection-name-in-mongo');
Meteor.methods({
  createDocument: function(collectionName, data) {
    global[collectionName].insert({
      data: data
    });
  }
});

This methodology is employed by meteor-autocomplete for transmitting collection names from the client to the server, demonstrating its practicality in application. (source)

For a deeper understanding of the interplay between collection names and variables in Mongo, refer to Understanding Meteor publish/subscribe.

Answer 2

The scenario here involves having separate collections on the client and server sides, as detailed further in Understanding Meteor publish/subscribe. It's not advisable to depend solely on the private _collection field. Instead, it's recommended to pass the collection name as a string to Meteor.call, ensuring consistency in variable naming for the collection on the server, and then accessing the collection by its name within the global object on the server:

// on the client:

MyCollection = new Mongo.Collection('record-set-name');  // as defined on the server through .publish()
Meteor.call('createDocument', 'MyCollection', data);

// on the server:
MyCollection = new Mongo.Collection('collection-name-in-mongo');
Meteor.methods({
  createDocument: function(collectionName, data) {
    global[collectionName].insert({
      data: data
    });
  }
});

This methodology is employed by meteor-autocomplete for transmitting collection names from the client to the server, demonstrating its practicality in application. (source)

For a deeper understanding of the interplay between collection names and variables in Mongo, refer to Understanding Meteor publish/subscribe.

Answer 3

Answer №2

Upon closer examination of the collection object, I discovered that it contains a nested object called _collection which houses functions such as insert, update, etc. By making the following adjustment to the code, you can successfully execute Mongo commands on a collection parameter within a Meteor method:

Meteor.methods({
  addNewDocument: function(collection, content) {
    collection._collection.insert({
      data: content
    });
  }
});

Answer 4

Upon closer examination of the collection object, I discovered that it contains a nested object called _collection which houses functions such as insert, update, etc. By making the following adjustment to the code, you can successfully execute Mongo commands on a collection parameter within a Meteor method:

Meteor.methods({
  addNewDocument: function(collection, content) {
    collection._collection.insert({
      data: content
    });
  }
});

Answer 5

Answer №3

In this scenario, the variable collection seems to represent a collection name. If you are dealing with multiple collection names, you can handle them in a similar manner within server methods. Here's an example:

Meteor.methods({
  createDocument: function(collection, data) {
    if(collection === "firstcollection") {
      firstcollection.insert({
        data: data
      });
    } else if(collection === "secondcollection") {
      secondcollection.insert({
        data: data
      });
    }
  }
});

Answer 6

In this scenario, the variable collection seems to represent a collection name. If you are dealing with multiple collection names, you can handle them in a similar manner within server methods. Here's an example:

Meteor.methods({
  createDocument: function(collection, data) {
    if(collection === "firstcollection") {
      firstcollection.insert({
        data: data
      });
    } else if(collection === "secondcollection") {
      secondcollection.insert({
        data: data
      });
    }
  }
});

Is it possible to execute a MongoDB insert within a Meteor method?

Answer №1

Answer №2

Answer №3

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