CODEWITHSUNDEEP
pythondjango
epalm
epalm

Reputation: 4423

In the Django Admin Site, how can I access model properties through an Inline?

models.py:

class Player(models.Model):
    name = models.CharField(max_length=50)
    email = models.EmailField(max_length=50)

class Tournament(models.Model):
    name = models.CharField(max_length=50)

class TournamentPlayer(models.Model):
    tournament = models.ForeignKey(Tournament)
    player = models.ForeignKey(Player)
    paid = models.BooleanField()

    def player_email(self):
        return self.player.email

admin.py:

class TournamentPlayerInline(admin.TabularInline):
    model = TournamentPlayer
    fields = ('player', 'paid', 'player_email')

@admin.register(Tournament)
class TournamentAdmin(admin.ModelAdmin):
    inlines = [TournamentPlayerInline]

I have an Inline question. When I pull up a Tournament in the Admin Site, I can see which players are going, and if they paid. I would also like to display extra information contained in Player, for example email address.

In TournamentPlayerInline I thought I might be able to get away with fields = ('player', 'paid', 'player_email') but I get FieldError: Unknown field(s) (player_email) specified for TournamentPlayer.

I also tried fields = ('player', 'paid', 'player__email'), but I get FieldError: Unknown field(s) (player__email) specified for TournamentPlayer.

If I move player_email from fields to readonly_fields, I no longer get the error, but the player email also isn't displayed either.

This is what I'm after:

enter image description here

How can I access Player properties from TournamentPlayerInline?

Django 1.8.4

Upvotes: 9

Views: 7002

Answers (3)

nicotine
nicotine

Reputation: 290

As an alternative, you do not have to define your custom property in your model if you're not using it directly, and just want to view it in admin -- you can create it in the Inline via a mixin:

models.py

class Player(models.Model):
    name = models.CharField(max_length=50)
    email = models.EmailField(max_length=50)

class Tournament(models.Model):
    name = models.CharField(max_length=50)

class TournamentPlayer(models.Model):
    tournament = models.ForeignKey(Tournament)
    player = models.ForeignKey(Player)
    paid = models.BooleanField()

admin.py

class PlayerEmailMixin(object):
    def player_email(self, obj):
        return obj.player.email

    player_email.short_description = "Player Email"

class TournamentPlayerInline(PlayerEmailMixin, admin.TabularInline):
    model = TournamentPlayer
    fields = ('player', 'player_email', 'paid', )
    readonly_fields = ('player_email',)

@admin.register(Tournament)
class TournamentAdmin(admin.ModelAdmin):
    inlines = [TournamentPlayerInline]

You could also make it a mailto URI this way:

class PlayerEmailMixin(object):
    def player_email(self, obj):
        return '<a href="mailto:{0}"><strong>{0}</strong></a>'.format(obj.player.email)

    player_email.short_description = "Player Email"
    player_email.allow_tags = True

This is known to work in Django 1.9.5

Upvotes: 0

Anthony Clever
Anthony Clever

Reputation: 120

Monkey's answer is almost correct. The only change you have to make is to your admin.py, and it's merely adding 'player_email' to both fields as well as readonly_fields. Changing the position of 'player_email' in fields will allow you to order it as per your example.

class TournamentPlayerInline(admin.TabularInline):
    model = TournamentPlayer
    fields = ('player', 'player_email', 'paid',)
    readonly_fields = ('player_email',)

@admin.register(Tournament)
class TournamentAdmin(admin.ModelAdmin):
    inlines = [TournamentPlayerInline]

Upvotes: 8

Kyle Pittman
Kyle Pittman

Reputation: 3077

If you do not require the player_email to be editable from the inline, then you can accomplish this with the readonly_fields variable:

class TournamentPlayerInline(admin.TabularInline):
    model = TournamentPlayer
    fields = ('player', 'paid')
    readonly_fields = ('player_email',)

@admin.register(Tournament)
class TournamentAdmin(admin.ModelAdmin):
    inlines = [TournamentPlayerInline]

Upvotes: 1

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