• Users

{
    "_id": < ObjectId > ,
    "email": < String >,
    "name": < String > ,
    "password": < String >     
}

• Boards

{
    "_id": < ObjectId > ,
    "title": < String > ,
    "content": < String > ,
    "category": < String > ,
    "create_date": < Date > ,
		"update_date": < Date > ,
    "user_id": < ObjectId > ,
		"count": < Integer >
}

• Comments

{
    "_id": < ObjectId > ,  
    "content": < String > ,
    "create_date": < Date > ,
		"update_date": < Date > ,
    "user_id": < ObjectId > ,
		"board_id": < ObjectId > 
}

• ReComments

{
    "_id": < ObjectId > ,  
    "content": < String > ,
    "create_date": < Date > ,
		"update_date": < Date > ,
    "user_id": < ObjectId > ,
		"comment_id": < ObjectId > 
}

• BoardCounts

{
    "_id": < ObjectId > ,  
    "user_id": < ObjectId > ,
		"board_id": < ObjectId >
}