list_display 带有外键的模型

Question

我有以下 django 模型。 在TestCase 表的django admin 模型中，在它的list_display 中，我想显示最近的评论和Remark 表的修饰符名称。

models.py

from django.db import models

class Release(models.Model):
    title        = models.CharField(max_length=128)
    start_time   = models.DateField('Release Start Date')
    release_date = models.DateField('Release Ended Date')

    def __str__(self):
        return self.title

class TestCase(models.Model):
    query       = models.CharField(max_length=256)
    ksq_id      = models.IntegerField()
    status      = models.CharField(max_length=64)
    release     = models.ForeignKey(Release) # Release can have many test cases

    def __str__(self):
        return self.query

class Remark(models.Model):
    owner       = models.CharField(max_length=64)
    module      = models.CharField(max_length=64)
    comment     = models.CharField(max_length=1024)
    modified_ts = models.DateTimeField('date modified', auto_now=True)
    modifier    = models.CharField(max_length=64)
    testcase    = models.ForeignKey(TestCase) # Testcase can have many Re

admin.py

from django.contrib import admin
from kramer_release.models import Release, TestCase, Remark

class RemarksInline(admin.TabularInline):
    model = Remark
    extra = 0 

class RemarkAdmin(admin.ModelAdmin):
    list_display = ('owner', 'module', 'testcase_query')

    def testcase_query(self, obj):
        return obj.testcase.query

class TestCaseAdmin(admin.ModelAdmin):
    inlines = [RemarksInline]
    list_display = ('query', 'status')

admin.site.register(Release)
admin.site.register(TestCase, TestCaseAdmin)
admin.site.register(Remark, RemarkAdmin)

Answer 1

您可以在管理类中定义一个函数来获取最新评论，例如：

class TestCaseAdmin(admin.ModelAdmin):
    inlines = [RemarksInline]
    list_display = ('query', 'status', 'latest_comment')

    def latest_comment(self, obj):
        remarks = Remark.objects.filter(testcase=obj).order_by('-modified_ts')
        if remarks:
            return '%s - %s' % (remarks[0].comment, remarks[0].modifier)
        return None

see the docs