Postgres/psycopg2 - Inserting array of strings

Question

I\'m using Postgres 9 and Python 2.7.2 along with psycopg2 and am trying to insert an array of string values with properly escaped quotation marks. Sample:

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Answer 1

When you want to insert an array into a postgreSQL DB via SQL you do it like this:

INSERT INTO tablename VALUES ('{value1,value2,value3}');

ATTENTION: You need the single quotes to surround the curly braces! So actually you're passing a String/Varchar of a special "array" grammar to the DB

If I enter your code into a python parser I get something like this:

'{'Name': 'Guest', 'Details': "['One', 'Two', 'Three']"}'

But PostgreSQL expects something like this:

'{"Name","Guest","Details",{"One","Two","Three"}}'

Check the manual on Arrays: http://www.postgresql.org/docs/9.0/static/arrays.html

So either you format the String according to the PostgreSQL "array-grammar" by writing a helper function or you use a library which does that for you.