Build JSON API Responses With Postgres CTEs

2017 Apr30

P

agination is a recurring problem that developers have to deal with when implementing data access layers for APIs. It can be particularly tricky with the more traditional RDMS like MySQL or Postgresql. For example, let's say we had an API endpoint that allowed consumers to search a data base of moves. We could search by title, director, starring actors, etc. Our data base has millions of movies, and we know we don't want to return all all the potential matches for every search request. We only want to return the top 25 or so records and indicate in the response that there are more results to query for:

{
  meta: {
    total: 12000
  , limit: 25
  , next: <URL TO NEXT PAGE&

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filed under:  sql node.js postgres

Django SQL Tracing Middleware

2013 Jan08
T

here are a number of tools within the Django framework itself as well as he community for inspecting all of the SQL Django is executing. The Debug Toolbar has be come the defacto standard in that respect. However, most all, if not all of the usual suspects are relying on template tags and rendered html templates / javascript to read the debug information. All fine and good, unless you are building an ajax application that never renders html or makes use of the template hooks.

The simple solution to this problem is to write a middleware class to spit out the sql generated by the database connection for the current request. And of course some color coding to make it

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filed under:  django ansi tracing middleware sql