In my project setup querying is being done based on the SQLAlchemy.
As per my previous requirements I have done the union with two queries.
Now I need to do Union with three queries.
Code is as follows:
query1 = query1.filter(model.name == "in-addr.arpa.")
query2 = query2.filter(model.tenant_id.in_(tenant_ids))
query = query1.union(query2)
Now Here I need to add one more query as follows:
query3 = query3.filter(model.tenant_id == context.tenant_id)
So I need to perform Union with all the three queries.
The solution is following:
query1 = query1.filter(model.name == "in-addr.arpa.")
query2 = query2.filter(model.tenant_id.in_(tenant_ids))
query3 = query3.filter(model.tenant_id == context.tenant_id)
query = query1.union(query2,query3)
This is how I did this in SQLAlchemy 1.3
from sqlalchemy import union
query1 = query1.filter(model.name == "in-addr.arpa.")
query2 = query2.filter(model.tenant_id.in_(tenant_ids))
query3 = query3.filter(model.tenant_id == context.tenant_id)
all_queries = [query1, query2, query3]
golden_set = union(*all_queries)
The change here is that the union method accepts a list of SQLAlchemy selectables.
In SQLAlchemy 1.4 you will need to use the function union and pass the queries as positional arguments instead of a list.
from sqlalchemy import union
query1 = query1.filter(model.name == "in-addr.arpa.")
query2 = query2.filter(model.tenant_id.in_(tenant_ids))
query3 = query3.filter(model.tenant_id == context.tenant_id)
query = union(query1, query2, query3)
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