Mongoid Scope Check If Array Field Contains Value
You're drastically overcomplicated things. If a field holds an array then you can search it as though it wasn't an array. For example, if you have this in a document:
{ some_array: [ 'where', 'is', 'pancakes', 'house?' ] }and you do a query like this:
where(:some_array => 'pancakes')you'll find that document. You don't need $elemMatch or anything complicated here; you can pretend that the array is a single value for simple queries like you have:
scope :some_scope, ->(value) { where(:some_array => value) }You only need to get into $elemMatch if you want to apply multiple conditions to each element of the array, things like this from the $elemMatch docs:
results: { $elemMatch: { $gte: 80, $lt: 85 } }// ^^^^^^^array ^^^^^^^^^^^^^^^^^^^^^multiple conditionsDon't feel bad, the current MongoDB docs aren't exactly clear on this stuff (or at least I can't find an explicit explanation).