I have a Meteor app that has a collection of chat groups. Each document in this collection looks like this:
{groupname: 'name', whitelist: ['person1', 'person2', 'person3'], messages:['message1', 'message2', 'message3']}
To show each person with an account what groups they are part of, I need a page with a list of those groups they're allowed in. How can I use a find() command to return all of the documents whose whitelist array contains the user's name?
Something like this:
ChatGroups.find({whitelist: Meteor.user().username});
This assumes that username
is the property you want to match against. You don't need to do anything special to search within an array in this case - mongo will do the correct thing (compare username
to each element of each whitelist
and return those documents that match).
To search in MongoDB by array items - use $in
operator:
ChatGroups.find({
whitelist: {
$in: [Meteor.user()._id]
}
});
Reference: Comparison Query Operators > $in
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