PYROS

h1. CONFIGURATION of the Django Back Office (administration interface)

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h3. Back Office setup

 * Prerequisites in src/pyros/settings.py :

    * INSTALLED_APPS must (at least) contain :

        * django.contrib.admin

        * django.contrib.auth

        * django.contrib.contenttypes

        * django.contrib.sessions

    * MIDDLEWARE_CLASSES must (at least) contain :

        * django.contrib.sessions.middleware.SessionMiddleware

        * django.middleware.common.CommonMiddleware

        * django.contrib.auth.middleware.AuthenticationMiddleware

 * At least one 'python manage.py migrate' must have been executed

 * Create a superuser for the administration :

<pre>

$ python manage.py createsuperuser

</pre>

* For each app of the project, fill the admin.py file :

<pre>

from django.contrib import admin

from app.models import Model1, Model2, ..., ModelN

(or "from app.models import *")

admin.site.register(Model1)

admin.site.register(Model2)

...

admin.site.register(ModelN)

</pre>

So, for our application "pyrosapp", we have:

<pre>

from pyrosapp.models import *

...

</pre>

*Reminder* : each application must be registered in the settings.py INSTALLED_APPS variable.

* For each model in models.py, add a '__str__()' method in order to identify the object on the back office. Example :

<pre>

class UserLevel(models.Model):

    name = models.CharField(max_length=45, blank=True, null=True)

    desc = models.TextField(blank=True, null=True)

    priority = models.IntegerField(blank=True, null=True)

    quota = models.FloatField(blank=True, null=True)

    class Meta:

        managed = True

        db_table = 'userlevel'

    def __str__(self):

        return (str(self.name))

</pre>

*Naming convention* : Use self.name when possible, the creation time/date otherwise. Example :

<pre>

class SiteWatch(models.Model):

    updated = models.DateTimeField(blank=True, null=True)

    lights = models.CharField(max_length=45, blank=True, null=True)

    dome = models.CharField(max_length=45, blank=True, null=True)

    doors = models.CharField(max_length=45, blank=True, null=True)

    temperature = models.FloatField(blank=True, null=True)

    class Meta:

        managed = True

        db_table = 'sitewatch'

    def __str__(self):

        return (str(self.updated))

</pre>

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h3. Adaptation of the one-to-many and many-to-many display

*1) The one-to-many relationships*

* The one-to-many relationships are the following (One.many format) :

    * Schedule.sequences

    * Request.sequences

    * Sequence.albums

    * Album.plans

    * Plan.images

    * Telescope.detectors

    * Detector.filters

    * NrtAnalysis.images

    * Filter.plans

    * Detector.albums

    * UserLevel.users

    * Country.users

    * ScientificProgram.requests

    * User.requests

    * StrategyObs.alerts

    * SequenceType.sequences

* For each "many", create a new class in admin.py just after the imports, following these examples :

<pre>

For Schedule.sequences, Request.sequences and Sequentype.sequences, we will need :

class SequenceInline(admin.TabularInline):

    model = Sequence

    readonly_fields = ("name",)

    fields = ("name",)

    show_change_link = True

For Sequence.albums and Detector.albums, we will need :

class AlbumInline(admin.TabularInline):

    model = Album

    readonly_fields = ("name",)

    fields = ("name",)

    show_change_link = True

For StrategyObs.alerts, we will need :

class AlertInline(admin.TabularInline):

    model = Alert

    readonly_fields = ("request_name",) # there is no 'name' attribute in the Alert model, so we use a custom method

    fields = ("request_name",)

    show_change_link = True

</pre>

* For each "One", declare a new class in admin.py, just after the "Inlines" class declaration, as done in the following examples :

<pre>

For Request.sequences :

class RequestAdmin(admin.ModelAdmin):

    inlines = [

	SequenceInline,

    ]

For Detector.filters and Detector.albums :

class DetectorAdmin(admin.ModelAdmin):

    inlines = [

        FilterInline,

        AlbumInline,

    ]

</pre>

*2) The many-to-many relationships*

* The many-to-many relationships are the following :

    * ScientificProgram - User

    * ScheduleHistory - Sequence

* For each many-to-many relationship, declare a new "Inline" class in admin.py just after the imports, like this :

<pre>

For ScientificProgram - User :

class UserAndSPInline(admin.TabularInline):

    model = ScientificProgram.users.through

For ScheduleHistory - Sequence

class SequenceAndSHInline(admin.TabularInline):

    model = ScheduleHistory.sequences.through

</pre>

+Note :+ The order in the line "model = ScientificProgram.users.through" is very important : the first model (ScientificProgram) is the one in which is declared the ManyToManyField relationship.

* For each many-to-many relationship, declare two new classes in admin.py, just after the inlines, like in the following examples :

<pre>

For the ScheduleHistory - Sequence relationship :

class ScheduleHistoryAdmin(admin.ModelAdmin):

    inlines = [

        SequenceAndSHInline,

    ]

    exclude = ('sequences',) # ScheduleHistory declares the ManyToManyField, and we want to replace its display in the back office, so we won't display the default field

class SequenceAdmin(admin.ModelAdmin):

    inlines = [

        AlbumInline,        # This is the Inline for the one-to-many relationship Sequence.albums

        SequenceAndSHInline,                                                                

    ]

For the ScientificProgram - User relationship :

class ScientificProgramAdmin(admin.ModelAdmin):

    inlines = [

        RequestInline,

	UserAndSPInline,                                                                         

    ]

    exclude = ('users',) # Same as ScheduleHistory                                                                         

class UserAdmin(admin.ModelAdmin):

    inlines = [

	RequestInline,   # This is the Inline for the one-to-many relationship User.requests

        UserAndSPInline,                                                                    

    ]

</pre>

* For each ModelAdmin class in the admin.py, change the registering line

<pre>

admin.site.register(Album)

</pre>

to

<pre>

admin.site.register(Album, AlbumAdmin)

</pre>