In your thread Join data collection MongoDB inside an array and two element result add array element, I wrote
Please read Formatting code and log snippets in posts and update your sample documents so that we can cut-n-paste into our system.
In another thread of yours, Add value to new AddFields Array, I wrote
Please read Formatting code and log snippets in posts and update your sample documents so that we can cut-n-paste into our system.
And finally, in Aggregate - return the whole array if query match one element in the array, I replied
Please read Formatting code and log snippets in posts and update your sample documents so that we can cut-n-paste into our system.
This is the third time I write you the above. Help us help you by providing your document in a usable form. Editing documents that are badly formatted is time consuming. It is easier to help others that have well formatted documents so we answer them faster. It is really really easy for you to supply documents that are easy to cut-n-paste into our systems.
Good Luck!