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postgres-jackson-example's Introduction

Database to domain example

What?

Example application using Postgres JSON aggregates and Jackson to deserialize domain models (example for this blog post )

The application is a spring boot rest api with endpoints that can read Questionnaires from postgres

GET /questionnaires
GET /questionnaires/{id}

Given this schema:

Screenshot 2021-02-13 at 14 06 22

We can use Postgres' json_agg and json_build_object functions to build JSON objects on read that can be easily deserialized by Jackson

Run the application

Make sure you have postgres running locally and create a database questionnaire_example

> pqsl
> CREATE DATABASE questionnaire_example;

Run the spring boot server (migrations will happen automatically):

> ./gradlew bootRun

Then visit http://localhost:8080/questionnaires to see the questionnaires responses

Screenshot 2021-02-13 at 18 08 30

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