PYROS

h1. Technical Documentation for the PYROS project (FGFT-CC)

HOWTO Format Redmine Wiki : http://www.redmine.org/projects/redmine/wiki/FrRedmineWikiFormatting

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h2. %{margin-left:0px; font-weight:bold; font-size:25px; display:block; color:red;}I - TODO%

* installation sur windows

* gitlab

* séparation des BD Django et Pyros

* intégration dans Eclipse

* récupération des modules existants

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h2. %{margin-left:0px; font-weight:bold; font-size:25px; display:block; color:red;}I - DATABASE SCHEMA%

{{thumbnail(PYROS_PDM_v021.png, size=300, title=Pyros data model)}}

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h2. %{margin-left:0px; font-weight:bold; font-size:25px; display:block; color:red;}II - INSTALLATION%

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h3. If necessary, install MySql

* Linux Ubuntu
<pre>

$ sudo apt-get install mysql-server
$ sudo apt-get install mysql-client

</pre>

* Linux CentOS
<pre>
TODO:
$ sudo yum install mysql
...
</pre>

* Mac OS X
<pre>
TODO:
Install XAMPP
(but you could also use the pre-installed Mac OS MySql)
</pre>

* Windows
<pre>
TODO:
</pre>

---

h3. Create database

* Linux and Mac OS X:
<pre>
One liner:
$ mysql -u root < pyros_create.sql

Or :
$ mysql -u root
mysql> create database pyros;
mysql> use pyros;
mysql> source pyros_create.sql;

(
TODO:
mysql> grant all on pyros.* to pyros@localhost identified by ‘pyros’;)
mysql> flush privileges;
)
</pre>

* Windows:
<pre>
TODO: Use phpmyadmin ?
</pre>

---

h3. Install python3.5

* Mac OS X :
<pre>
1) Installer MacPort
(TODO: doc)

2) Installer le "port" python35
$ sudo port install python35
</pre>

* Linux (Ubuntu) :
<pre>
sudo add-apt-repository ppa:fkrull/deadsnakes
sudo apt-get update
sudo apt-get install python3.5

sudo pip install virtualenv
</pre>

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h3. Create project dir

<pre>
$ mkdir PYROS
</pre>

---

h3. Get the project (from git)

<pre>
TODO:

$ git ...
</pre>

---



h3. Create virtualenv with python3.5 dedicated to pyros project (inside the project folder)

$ cd PYROS/private/ PYROS/

$ which python3.5
/opt/local/bin/python3.5

$ virtualenv-3.5 venv_py35_pyros -p /opt/local/bin/python3.5
=> creates a venv_py35_pyros/ folder inside PYROS/private/ pyros/

---



h3. Activate the python virtual environment (from inside the project)

<pre>

$ pwd
.../PYROS

$ source ./venv_py35_pyros/bin/activate

$ python -V
Python 3.5.1

$ which pip
.../PYROS/venv_py35_pyros/bin/pip

Upgrade pip to last version available :
$ pip install --upgrade pip
Collecting pip
Downloading pip-8.1.1-py2.py3-none-any.whl (1.2MB)
Installing collected packages: pip
Found existing installation: pip 7.1.2
Uninstalling pip-7.1.2:
Successfully uninstalled pip-7.1.2
Successfully installed pip-8.1.1

</pre>

h3. Install needed python packages (from within the virtual environment)

First, be sure that the virtual environment is activated:
<pre>
$ python -V
Python 3.5.1
</pre>

* *Automatic Installation of all packages*
<pre>
$ pip install -r REQUIREMENTS.txt
</pre>

* *Or, manual installation of each package*

* *Install Django* :
<pre>
$ pip install django
Collecting django
Downloading Django-1.9.4-py2.py3-none-any.whl (6.6MB)
Installing collected packages: django
Successfully installed django-1.9.4

$ pip install django-admin-tools
Collecting django-admin-tools
Downloading django_admin_tools-0.7.2-py2.py3-none-any.whl (289kB)
Installing collected packages: django-admin-tools
Successfully installed django-admin-tools-0.7.2

$ pip install django-debug-toolbar
Collecting django-debug-toolbar
Downloading django_debug_toolbar-1.4-py2.py3-none-any.whl (212kB)
Requirement already satisfied (use --upgrade to upgrade): Django>=1.7 in ./venv_py35_pyros/lib/python3.5/site-packages (from django-debug-toolbar)
Collecting sqlparse (from django-debug-toolbar)
Downloading sqlparse-0.1.19.tar.gz (58kB)
Building wheels for collected packages: sqlparse
Running setup.py bdist_wheel for sqlparse ... done
Stored in directory: /Users/epallier/Library/Caches/pip/wheels/7b/d4/72/6011bb100dd5fc213164e4bbee13d4e03261dd54ce6a5de6b8
Successfully built sqlparse
Installing collected packages: sqlparse, django-debug-toolbar
Successfully installed django-debug-toolbar-1.4 sqlparse-0.1.19

$ pip install django-extensions
Collecting django-extensions
Downloading django_extensions-1.6.1-py2.py3-none-any.whl (202kB)
Collecting six>=1.2 (from django-extensions)
Downloading six-1.10.0-py2.py3-none-any.whl
Installing collected packages: six, django-extensions
Successfully installed django-extensions-1.6.1 six-1.10.0

$ pip install django-suit
Collecting django-suit
Downloading django-suit-0.2.18.tar.gz (587kB)
Building wheels for collected packages: django-suit
Running setup.py bdist_wheel for django-suit ... done
Stored in directory: /Users/epallier/Library/Caches/pip/wheels/12/8b/9a/e02ab0ad9229881638aa040d47d77c8f562999533811927d41
Successfully built django-suit
Installing collected packages: django-suit
Successfully installed django-suit-0.2.18

</pre>

* *Install the web application server gunicorn (will be used in production instead of the dev django web server)* :
<pre>
$ pip install gunicorn
Collecting gunicorn
Downloading gunicorn-19.4.5-py2.py3-none-any.whl (112kB)
Installing collected packages: gunicorn
Successfully installed gunicorn-19.4.5
</pre>

* *Install the python mysql client*:
<pre>
$ pip install mysqlclient
...
</pre>

* => Issue under Mac OS X:
<pre>
$ pip install mysqlclient
Collecting mysqlclient
Downloading mysqlclient-1.3.7.tar.gz (79kB)
Building wheels for collected packages: mysqlclient
Running setup.py bdist_wheel for mysqlclient ... error
…
----------------------------------------
Failed building wheel for mysqlclient
Running setup.py clean for mysqlclient
Failed to build mysqlclient
Installing collected packages: mysqlclient
Running setup.py install for mysqlclient ... done
Successfully installed mysqlclient-1.3.7

BOUH !!!

$ pip install --upgrade wheel
Collecting wheel
Downloading wheel-0.29.0-py2.py3-none-any.whl (66kB)
Installing collected packages: wheel
Found existing installation: wheel 0.24.0
Uninstalling wheel-0.24.0:
Successfully uninstalled wheel-0.24.0
Successfully installed wheel-0.29.0

$ pip uninstall mysqlclient

$ pip install mysqlclient
Collecting mysqlclient
Using cached mysqlclient-1.3.7.tar.gz
Building wheels for collected packages: mysqlclient
Running setup.py bdist_wheel for mysqlclient ... done
Stored in directory: /Users/epallier/Library/Caches/pip/wheels/9b/06/50/d11418c26cf8f2156b13d4363b5afde8e7e75ebb8540d0228d
Successfully built mysqlclient
Installing collected packages: mysqlclient
Successfully installed mysqlclient-1.3.7

YES !!!

</pre>

* => Issues under Ubuntu:
<pre>
$ pip install mysqlclient
Collecting mysqlclient
Downloading mysqlclient-1.3.7.tar.gz (79kB)
100% |████████████████████████████████| 81kB 1.5MB/s
Complete output from command python setup.py egg_info:
/bin/sh: 1: mysql_config: not found
Traceback (most recent call last):
File "<string>", line 1, in <module>
[...]
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-q6j4inuz/mysqlclient/

BOUH !!!

$ sudo apt-get install libmysqlclient-dev

$ pip install mysqlclient
Collecting mysqlclient
Using cached mysqlclient-1.3.7.tar.gz
Building wheels for collected packages: mysqlclient
Running setup.py bdist_wheel for mysqlclient ... error
…
_mysql.c:40:20: fatal error: Python.h: No such file or directory
#include "Python.h"
^
compilation terminated.
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

----------------------------------------
Command "/home/carens_p/pyros/venv_py35_pyros/bin/python3.5 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-k3klv92j/mysqlclient/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-gz242xxs-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/carens_p/pyros/venv_py35_pyros/include/site/python3.5/mysqlclient" failed with error code 1 in /tmp/pip-build-k3klv92j/mysqlclient/

BOUH !!!

$ sudo apt-get install python3.5-dev

$ pip install mysqlclient

YES !!!

</pre>

* *Set Requirements*

<pre>
$ pip freeze > REQUIREMENTS.txt
</pre>

---

h3. Project organization

Example of a good organization :

1 project = N applis
(but 1 appli can be part of many projects)
(then 1 appli = N models)

<pre>

MYPROJECT/

src/
myproject/
appli1/
appli2/
…
appliN/

public/
static/

private/
REQUIREMENTS.txt

venv_py35_pyros/

</pre>

Set needed folders:
<pre>
$ cd PYROS/
$ mkdir private public
$ mkdir public/static
</pre>

---

h3. Create Django project pyros

<pre>

From inside the project:
$ pwd
.../PYROS/

$ django-admin startproject pyros

$ mv pyros src

$ mv REQUIREMENTS.txt private/

We have then this architecture:

PYROS
├── private
│ └── REQUIREMENTS.txt
├── public
│   └── static
├── src
│   ├── db.sqlite3
│   ├── manage.py
│   ├── pyros
│   │   ├── __init__.py
│   │   ├── settings.py
│   │   ├── urls.py
│   │   └── wsgi.py
└── venv_py35_pyros

$ cd src/

$ ./manage.py runserver
(or gunicorn pyros.wsgi)
==> http://localhost:8000
...
...
Ctrl-c

</pre>

---

h3. Set Database engine as MySql

Edit src/pyros/settings.py

<pre>
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'pyros',
'USER': 'root',
'PASSWORD': ''
}
}
</pre>

---

h3. Import database into Django (with inspectdb)

From src/ :

<pre>
$ ./manage.py inspectdb > models.py
</pre>

Issue on Mac OS X:
<pre>
Traceback (most recent call last):
File "/Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/django/db/backends/mysql/base.py", line 25, in <module>
import MySQLdb as Database
File "/Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/MySQLdb/__init__.py", line 19, in <module>
import _mysql
ImportError: dlopen(/Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/_mysql.cpython-35m-darwin.so, 2): Library not loaded: libmysqlclient.18.dylib
Referenced from: /Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/_mysql.cpython-35m-darwin.so
Reason: image not found

=> BOUH !!!

LA SOLUTION EST ICI : http://stackoverflow.com/questions/6383310/python-mysqldb-library-not-loaded-libmysqlclient-18-dylib

Il suffit de faire ceci:

$ sudo mkdir -p /usr/local/lib
$ sudo ln -s /Applications/XAMPP/xamppfiles/lib/libmysql* /usr/local/lib/

Mais on peut aussi faire ceci:

Okay, so the offending file is /Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/_mysql.cpython-35m-darwin.so

Next, figure out where _mysql.so thinks it should find libmysqlclient.18.dylib:

$ otool -L /Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/_mysql.cpython-35m-darwin.so
/Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/_mysql.cpython-35m-darwin.so:
libmysqlclient.18.dylib (compatibility version 18.0.0, current version 18.0.0)
...

So, it's looking for libmysqlclient.18.dylib with no path information, let's fix that:

$ locate libmysqlclient.18.dylib
/Applications/XAMPP/xamppfiles/lib/libmysqlclient.18.dylib
/Library/SystemMigration/History/Migration-68137DFB-CB6A-4FBB-81E2-11BDB5D01E48/QuarantineRoot/usr/lib/libmysqlclient.18.dylib

$ sudo install_name_tool -change libmysqlclient.18.dylib /Applications/XAMPP/xamppfiles/lib/libmysqlclient.18.dylib /Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/_mysql.cpython-35m-darwin.so

Now _mysql.so knows the full path to the library and everything works, regardless of environment variables.

$ otool -L /Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/_mysql.cpython-35m-darwin.so
/Users/epallier/Documents/_W_more/PROJECTS/GFT/SOFT/PYROS/pyros/venv_py35_pyros/lib/python3.5/site-packages/_mysql.cpython-35m-darwin.so:
/Applications/XAMPP/xamppfiles/lib/libmysqlclient.18.dylib (compatibility version 18.0.0, current version 18.0.0)
...

$ ./manage.py inspectdb > models.py

=> YES !!!
</pre>

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h3. Create a Django application pyrosapp

From src/ :

<pre>
$ ./manage.py startapp pyrosapp
</pre>

We obtain this structure:

<pre>

PYROS/
├── private
│   └── REQUIREMENTS.txt
├── public
│   └── static
├── src
│   ├── db.sqlite3
│   ├── manage.py
│   ├── pyros
│   │   ├── __init__.py
│   │   ├── __pycache__
│   │   ├── settings.py
│   │   ├── urls.py
│   │   └── wsgi.py
│   └── pyrosapp
│   ├── __init__.py
│   ├── admin.py
│   ├── apps.py
│   ├── migrations
│   ├── models.py
│   ├── tests.py
│   └── views.py
└── venv_py35_pyros

</pre>

---

h3. Replace the default pyrosapp models.py with the inspectdb generated one

From src/ :

<pre>
$ mv models.py pyrosapp/
</pre>

---

h3. *TODO: Fix and improve the pyrosapp models.py file (generated by inspectdb)*

From src/pyrosapp/ :

Edit models.py

Do these changes:
...

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h2. %{margin-left:0px; font-weight:bold; font-size:25px; display:block; color:red;}II - CONFIGURATION of the Django Back Office (administration interface)%