How to use a Postgreql Boolean value as a parameter in a python if statement?

Question

I have been trying to create a python function that will use a select statement that will return a single Boolean value from my postgres database and then use it in a python if statement.

I have found out that when you print the result of the sql select statemtent the format is [(True,)]. However, nothing that I have tried putting in the python if statement has not worked.
I have tried:

True
"True"
"[(True,)]"
"[(" + str(True) + ",)]"

and none of these have worked and I can’t really think of what else it could be.

The sql statement I am executing is

cur = conn.cursor()
cur.execute("SELECT is_draft FROM item_pool WHERE item_id = " + str(item_id) + " ", {})
list_of_tuples = cur.fetchall()
conn.close()
return list_of_tuples

And I want to check if the is_draft Boolean that is returned is True in python.

Asked By: Ray Babich

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Source

Answer 1

In python

your function would return

return cursor.fetchone()[0]

which would return TRUE or FALSE

for a query like

SELECT EXISTS(SELECT 1 FROMmytable WHERE id = -1)

Answered By: nbk

How to use a Postgreql Boolean value as a parameter in a python if statement?

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