Fix unicode issue when generating migration with py2 or py3

[mounirmesselmeni]

Running makemigrations on Python 3 will generate a new migration because of Query.connection.help_text which is not unicode on Python 2 which lead to a migration file with byte see explorer/migrations/0006_query_connection.py

migrations.AddField(
            model_name='query',
            name='connection',
            field=models.CharField(help_text=b'Name of DB connection (as specified in settings) to use for this query. Will use EXPLORER_DEFAULT_CONNECTION if left blank', max_length=128, null=True, blank=True),
        ),

Adding from __future__ import unicode_literals will solve this problem but I've to add the right migration any way so that Django will not try generate a new one using Python3.

I have also added minor fixes to use @six.python_2_unicode_compatible

I hope this will be merged and released as soon as possible.

[mounirmesselmeni]

@chrisclark This is basically doing the same as #353 but fixing some unicode compatibility with Python 3 and the reason behind the missing migration is only with Python 3, as in Python 2 there is no migration generated.
Any chance getting this merged and released soon.

[chrisclark]

Great change. Approved and merged. I will try to do a release in the next 30 days.

[mounirmesselmeni]

Hello @chrisclark , Any chances releasing this soon? :)

[saz]

@chrisclark Can you make a new release?

[meIias]

Hi all, just wanted to give a heads-up that we are actively working towards a new release and you can expect it soon.

[lociii]

Hey @meIias,

any news about the release? We're checking for missing migrations doing a dry-run when deploying our software and have to work around the missing one for this library.
Would be great to be able to get rid off the workaround.

Thanks!

[MattFisher]

I don't want to pester, but is the new release going to come out soon? We've got an open PR to do a migration check in CI that's waiting on this fix.
Thanks for an awesome tool!

[meIias]

Sorry for the delay folks! the latest version 1.1.3 should be live as of today!