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<h3><a href="/article/netjsonconfig/">Testing "django-netjsonconfig"</a></h3>
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<span class="date moment">2018-01-14</span>
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<p>A task came up in Google Code-in which asked me to install the <a href="https://github.com/openwisp/django-netjsonconfig">django-netjsonconfig</a> module by <a href="https://www.openwisp.org">OpenWISP</a>. Furthermore, I’m also supposed to share the challenges I faced during the set-up process as a sort of feedback. I’ll be trying be concise in this post so, without further ado, I’m beginning with this post.</p>
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<h1 id="installing-django-netjsonconfig">Installing “django-netjsonconfig”</h1>
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<p>The installation instructions for this this module have been well-documented on its <a href="https://github.com/openwisp/django-netjsonconfig#installing-for-development">GitHub repository</a>. So I began the installation by creating a <strong>Python 2.7 Virtual Environment</strong> using <code>python2 -m virtualenv py2</code> for the sake of cleanliness on my local machine. I chose <code>python2</code> for since for this since I was also on the lookout for bugs in the module and most of the bugs seem to be related with it since it’s a bit outdated now.<br />
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I then activated the <code>virtualenv</code> and started entering the installation commands according to the instructions in the repository. Everything went on smoothly until the <code>python setup.py develop</code> command. I got an error as shown in the below picture.</p>
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<p><img src="/images/netjsonconfig/django2.png" alt="develop failed" /></p>
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<p>Clearly, the error suggests that <strong>Django v2.0.1</strong> was being downloaded which <strong>isn’t supported</strong> by <strong>Python 2.7</strong>. A bit of browsing led me to the conclusion that the <code>setup.py</code> needed to be modified to download <strong>older Django versions</strong> for Python 2.7. So, I added a simple <code>if-else</code> block to the django installation statement as shown in the picture.</p>
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<p><img src="/images/netjsonconfig/my-fix.png" alt="setup.py fix" /></p>
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<p>If you’re curious about my fix, this is the <a href="https://github.com/UtkarshVerma/django-netjsonconfig/commit/1575acbbc719e539cd8ecbffc761d8b9c2023d56">link</a>.</p>
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<p>Here, what’s being done is basically:</p>
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<ul>
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<li>Detect <code>python</code> version used for installation using <code>sys.version_info[0]</code>.</li>
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<li>Install older Django versions if <code>sys.version_info[0]<3</code>, that is <code>python2</code> is detected.</li>
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<li>Install latest version if above condition isn’t satisfied, that is <code>python3</code> is detected.</li>
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</ul>
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<p>I also had to remove the django installation line from <code>requirements.txt</code> since <code>setup.py</code> was fetching the requirement names from there. After applying this fix, I re-ran the <code>python setup.py develop</code> command and there it was! The sweet smell of success. Now an <strong>older yet python2 compatible</strong> version of <strong>Django</strong> was being installed when using <code>python2</code> as clearly shown in one of the pictures below:</p>
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<p><img src="/images/netjsonconfig/django-v-fixed.png" alt="Older Django being downloaded" /></p>
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<p><img src="/images/netjsonconfig/Success!.png" alt="Successful!" /></p>
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<p>After this, I installed some more requirements using <code>pip install -r requirements-test.txt</code>
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This was how I’d finished installing <code>django-netjsonconfig</code> using Python2. Now all that was left to do was to to do the migrations and run the server.</p>
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<h1 id="making-migrations-and-creating-a-superuser">Making Migrations and Creating a superuser</h1>
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<p>By referring to the instructions on the repo again, I opened the <code>tests</code> directory,
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did the migrations using <code>./manage.py migrate</code>. It was really satisfying to see all the CLI responses coloured in <strong>green</strong>. :smile:
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<img src="/images/netjsonconfig/migrate.png" alt="Migrate" /></p>
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<p>After that, there was the superuser creation using <code>./manage.py createsuperuser</code>.</p>
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<p><img src="/images/netjsonconfig/superuser.png" alt="Superuser creation" /></p>
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<h1 id="running-the-test-server">Running the Test Server</h1>
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<p>I started the test server using <code>./manage.py runserver</code> and it was successful.</p>
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<p><img src="/images/netjsonconfig/up-and-running.png" alt="Server Up and Running!" /></p>
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<p>I could also now visit the server at <a href="http://localhost/admin">http://localhost:8000/admin</a>.</p>
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<p><img src="/images/netjsonconfig/logged-in.png" alt="Logged In" /></p>
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<h1 id="conclusion">Conclusion</h1>
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<p>So, that’s how I installed the <strong>django-netjsonconfig</strong> module. Also, I’ve commited my fixes to my <strong>forked repo</strong> <a href="https://github.com/UtkarshVerma/django-netjsonconfig">here</a>. Here’s the <a href="https://github.com/openwisp/django-netjsonconfig/pull/71">link to my pull request</a>. That concludes this post.</p>
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