Hi ,
I have a collection of documents where each document has the fields
(besides others): parent_project_number and project number. Documents
which have the same parent_project_number, are sub projects of the document
with the parent_project_number. So e.g.
parent_project_number project_number
------------------------------ ---------------------
5 1
5 2
5 3
6 4
6 8
I would like to order the document collection so that I get a list of
project_numbers for each parent_project_number (as shown above) using a
compound key of [main_project_number, project_number]. Would I need to use
group_level, in order to achieve this order? Does using group_level need a
reduce block? What would the reduce block contain? Can you please give me a
code example? I am using the following query but I am only getting nulls:
[projectsView setMapBlock: MAPBLOCK({
if ([doc[@"type"] isEqualToString: @"projects"]) {
id main_project_numberid = doc[@"main_project_number"];
id project_numberid = doc[@"project_numberid"];
emit(@[main_project_numberid, project_numberid], doc[@"
project_numberid" );
}
}) version: @"1"];
CBLQuery *query = [projectsView createQuery];
query.grouplevel = 2;
CBLQueryEnumerator* result = [query run: &error];
Thanks
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