feat: Adds logic to fetch specific keys for a product

[kirtanchandak]

What

Adds logic to fetch specific keys related to a product in a comma-separated manner
http://127.0.0.1:8000/product/3760256070970?keys=taste
http://127.0.0.1:8000/product/3760256070970?keys=taste,size

Screenshot

Fixes bug(s)

#236

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.76%. Comparing base (b9cda65) to head (fe0c52c).
Report is 75 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #244      +/-   ##
==========================================
- Coverage   95.06%   94.76%   -0.30%     
==========================================
  Files           5        5              
  Lines         324      382      +58     
==========================================
+ Hits          308      362      +54     
- Misses         16       20       +4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[alexgarel]

Great job, I just added a suggestion for readability.

[alexgarel]

Please rewrite it to use f-string to improve readability

Suggested change

	query = """
	SELECT json_agg(j)::json FROM (
	SELECT * FROM folksonomy WHERE product = %s AND owner = %s
	"""
	params = [product, owner]
	if keys_list:
	placeholders = ', '.join(['%s'] * len(keys_list))
	query += f" AND k IN ({placeholders})"
	params.extend(keys_list)
	query += " ORDER BY k) as j;"
	params = [product, owner]
	if keys_list:
	placeholders = ', '.join(['%s'] * len(keys_list))
	key_clause = f"k IN ({placeholders})"
	params.extend(keys_list)
	else:
	key_clause = f"TRUE"
	query = f"""
	SELECT json_agg(j)::json FROM (
	SELECT * FROM folksonomy
	WHERE product = %s AND owner = %s AND {key_clause}
	ORDER BY k
	) as j;"

[kirtanchandak]

made the required changes, ready to merge! thanks @alexgarel

[alexgarel]

Maybe we can specify that without keys parameter, it returns all keys.

[kirtanchandak]

made the change, added more clear description

[alexgarel]

I approve your PR @kirtanchandak still you have a conflict to resolve. I also added a comment.

[kirtanchandak]

@alexgarel ready to merge resolved merge conflicts and made the description change

[CharlesNepote]

I have tested it, works fine. I'm going to merge. Thanks a lot!