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Documenting PostgreSQL Database

Please note that this article will cover only the basic usage of the tools. For detailed information on the features and customizing output refer to each component’s docs.

Installing prerequisites

You will need to install some prerequisites. If you are running Foliant natively, follow the guide below. If you are working with our Full Docker image, you don’t need to do anything, you can skip to the next stage.

First, you will need Foliant, of course. If you don’t have it yet, please, refer to the installation guide.

Install PostgreSQL and its Python connector.

$ pip3 install psycopg2-binary

Install DBDoc and PlantUML preprocessors, and the Slate backend:

$ pip3 install foliantcontrib.dbdoc foliantcontrib.slate, foliantcontrib.plantuml

We are going to use Slate for building a static website with documentation, so you will need to install Slate dependencies.

Finally, Install PlantUML, we will need it to draw the database scheme.

Creating project

Let’s create a Foliant project for our experiments. cd to the directory where you want your project created and run the init command:

$ cd ~/foliant_projects
$ foliant init
Enter the project name: Database Docs
Generating project... Done
Project "Database Docs" created in database-docs

$ cd database-docs

The other option is to clone the Foliant Project template repository:

$ cd ~/foliant_projects
$ mkdir database-docs
$ git clone database-docs
Cloning into 'database-docs'...
remote: Enumerating objects: 11, done.
remote: Counting objects: 100% (11/11), done.
remote: Compressing objects: 100% (7/7), done.
remote: Total 11 (delta 1), reused 11 (delta 1), pack-reused 0
Unpacking objects: 100% (11/11), done.
$ cd database-docs

Setting up project

Now it’s time to set up our config. Open foliant.yml and add the following lines:

title: Database Docs


+   - dbdoc:
+       dbms: pgsql
+       host: localhost
+       port: 5432
+       dbname: posgres
+       user: posgres
+       password: posgres
+  - plantuml

Make sure to use proper credentials for your PostgreSQL database. If you are running Foliant from docker, you can use host: host.docker.internal to access localhost from docker.

Note: if plantuml is not available under $ plantuml in your system, you will also need to specify path to platnum.jar in preprocessor settings like this:

  - plantuml:
      plantuml_path: /usr/bin/plantuml.jar

Finally, we need to point Foliant the place in the Markdown source files where the generated documentation should be inserted. Since we already have an chapter created for us by init command, let’s put it in there. Open src/ and make it look like this:

# Welcome to Database Docs

-Your content goes here.

Building site

All preparations done, let’s build our site:

$ foliant make site -w slate
Parsing config... Done
Applying preprocessor dbdoc... Done
Applying preprocessor plantuml... Done
Applying preprocessor flatten... Done
Applying preprocessor _unescape... Done
Making site... Done
Result: Database_Docs-2020-06-03.slate/

If you are using Docker, the command is:

$ docker-compose run --rm foliant make site -w slate

Now open Database_Docs-2020-06-03.slate/index.html and look what you’ve got:

That looks good enough, but you may want to tweak the appearance of your site. You can edit the Jinja-template to change the way DBDoc generates markdown out of your schema. The default template can be found here. Edit it and save in your project dir, then specify in the doc_template parameter. If you want to change the looks of your site, please, refer for instructions in Slate backend documentation.

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