New API end point for checking existence of IATI identifiers in the Datastore

[simon-20]

…atastore

[ghost]

In the GitHub workflows, does the new variable also need to be in Azure/appservice-settings stage?

[ghost]

In terms of what the API returns

a) around iati_identifiers_found, it returns {"ID":COUNT, ...} at the moment. How about {"ID":{"count":COUNT}, ...}? I'm just thinking this makes it easy for us to add additional data elements later without having to break backwards compatibility.

b) having a iati_identifiers_not_found could be good too - we talked before about how it could say if the prefix is at least valid or not. However, at the moment I think the value would just be {} so maybe it's fine to leave it and we can look later.

I guess the other approach is to put them all in one key, iati_identifiers with extra info on whether it was found or not. eg {"ID":{found: True, count:0}, "ID":{found:False, prefix_valid: True} but I think I like this one:

• it's easy to write checking code like if id in data['iati_identifiers_found'].keys() without having to check the extra found key.
• This way we can have different definitions for the dictionary of info that is got on found and not found id's