             cb         : undefined
         async.parallel([
             (cb) =>
-                query = "UPDATE projects SET hide_from_accounts=hide_from_accounts+{?} WHERE project_id=?"
-                @cql(query, [opts.account_id, opts.project_id], cb)
-            (cb) =>
-                query = "UPDATE accounts SET hidden_projects=hidden_projects+{?} WHERE account_id=?"
-                @cql(query, [opts.project_id, opts.account_id], cb)
+                query = "UPDATE projects SET hide_from_accounts=hide_from_accounts+{#{opts.account_id}} WHERE project_id=?"
+                @cql(query, [opts.project_id], cb)
+            (cb) =>
+                query = "UPDATE accounts SET hidden_projects=hidden_projects+{#{opts.project_id}} WHERE account_id=?"
+                @cql(query, [opts.account_id], cb)
         ], (err) => opts.cb?(err))
 
     unhide_project_from_user: (opts) =>

            table : required
            delta : 1
            cb    : required
        query = "update counts set count=count+? where table_name=?"
        @cql query, [opts.delta, opts.table], opts.cb

    # Get count of entries in a table for which we manually maintain the count.
    get_table_counter: (opts) =>

                ttl = "USING ttl #{opts.ttl}"
            else
                ttl = ""
            query = "UPDATE account_creation_actions #{ttl} SET actions=actions+{'#{misc.to_json(opts.action)}'} WHERE email_address=?"
            @cql(query, [opts.email_address], opts.cb)
        else
            @select
                table     : 'account_creation_actions'
