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POAccess foreign key fields from Admin Tabular Inline
 

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    <p>I'm trying to access a field of a foreign key within a Tabular Inline in the Django Admin.</p> <p>Despite my best efforts I can't seem to get it working. My current code is:</p> <pre><code>class RankingInline(admin.TabularInline): model = BestBuy.products.through fields = ('product', 'account_type', 'rank') readonly_fields = ('product', 'rank') ordering = ('rank',) extra = 0 def account_type(self, obj): return obj.products.account_type </code></pre> <p>Which results in:</p> <pre><code>'RankingInline.fields' refers to field 'account_type' that is missing from the form. </code></pre> <p>I have also tried using the model__field method, which I used as:</p> <pre><code>fields = ('product', 'product__account_type', 'rank') </code></pre> <p>Which results in:</p> <pre><code>'RankingInline.fields' refers to field 'product__account_type' that is missing from the form. </code></pre> <p>The models are defined as so:</p> <pre><code>class Product(BaseModel): account_type = models.CharField(choices=ACCOUNT_TYPE_OPTIONS, verbose_name='Account Type', max_length=1, default='P') class Ranking(models.Model): product = models.ForeignKey(Product) bestbuy = models.ForeignKey(BestBuy) rank = models.IntegerField(null=True, blank = True) class BestBuy(BaseModel): products = models.ManyToManyField(Product, through='Ranking') class BaseModel(models.Model): title = models.CharField(max_length = TODO_LENGTH) slug = models.CharField(max_length = TODO_LENGTH, help_text = """The slug is a url encoded version of your title and is used to create the web address""") created_date = models.DateTimeField(auto_now_add = True) last_updated = models.DateTimeField(auto_now = True) </code></pre> <p>What am I doing wrong?</p>
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