5.1. Initialising Database extensions

TEKSI Wastewater maintains database extensions to serve the following models:

AG-64 Abwasserkataster Version 2.1.0
AG-96 Genereller_Entwaesserungsplan_AG Version 2.0.0

The database is automatically loaded with the necessary tables and attributes for the extension. In order to be able to use an extension, activate the corresponding app modification Modification Framework for application schema

5.1.1. create an empty datamodel with an extension

In order to use a database extension, we need to load them from the source code:

Load a standard TWW Database * https://github.com/TWW/datamodel/releases/latest * download tww_{version}_structure_with_value_lists.sql
Download the source code * https://github.com/TWW/datamodel/releases/latest * download`Source Code(zip)`
if needed, temporarily alter your PGSYSCONFDIR environment variable

create and run a batch file such as:

@echo off
setlocal
set /p tww_dir="Set the directory your downloaded teksi wastewater to"

if not exist %tww_dir% (
   echo "Path %tww_dir% does not exist. Please download the latest datamodel from https://github.com/TWW/datamodel/releases (structure_with_value_lists.sql) and adjust path in this batch file."
   PAUSE
   exit -1
)

pip install pirogue

set /p myservice="Please enter the service name? (e.g. tww_community) "

    REM Set the PYTHONPATH to include the directory containing the app module
    set "PYTHONPATH=%tww_dir%\datamodel;%PYTHONPATH%"

python -m app.create_app.py --pg_service %myservice% --srid 2056 --drop-schema --extension_names agxx foobar demo

endlocal
PAUSE

For official models, an adapted value list sql is provided.

5.1.2. Generate the data model under Linux

You can also generate the data model extension under Linux.

Download the data model:

git clone https://github.com/TWW/datamodel
cd datamodel

Setup the pg_service.conf file and add the pg_tww service as in the Linux/macOS pg_service section.

Create the database:

psql -U postgres -c 'CREATE DATABASE tww;'

Set the environment variables for the generation script:
```
./scripts/db_setup.sh
```
Run the generation script:
```
./scripts/db_setup.sh
```