Question: FlowQueryList over joined dataset

DBFlow Version: 3.0.1 Issue Kind (Bug, Question, Feature): Question

Description:

I have the following problem. I have a table, lets call it Contact and another one referencing it via ForeignKey, lets call it Phone. So one Contact can have multiple Phone numbers. I need to display a list of contacts in RecyclerView showing all phones separated by comma for each contact in a row. To make this I create ModelView in which I query contacts, left join them with phones. I load this ModelView with CursorLoader and display its data in RecyclerView. Now I end up creating ModelView for every list in my applications and this bothers me much.

The question is, can I achieve the same behaviour without ModelView?

1. I was trying to use .queryCustomList() to get list of BaseQueryModel, but I extract all data in memory instanly this way and this is generally bad for performance. So I’m against this method.

2. I was trying to use FlowQursorList but it can’t handle joins and cannot be used to get list of BaseQueryModel:

SQLite.select(extendedContactColumns)
            .from(Contact.class)
            .leftOuterJoin(Phone.class)
            .on(Phone_Table.contact_id.eq(1L))
            .where(Contact_Table.id.is(1L))
            .flowQueryList() <--- converts to FlowQueryList<Contact>

[agrosner]

in develop. Use the new FlowQueryList.Builder<>(joinClass.class).cursor(cursor).build()

[agrosner]

if you specify a FlowCursorList or FlowQueryList with a Cursor, you cannot refresh() the list. I have updated the class to throw an exception. You must construct a new instance in that scenario once the Cursor has been closed.