interchan/board/admin.py

from django.contrib import admin
from django.utils.safestring import mark_safe
from board.models import Board, Post, ReportReason, Report


@admin.register(Board)
class BoardAdmin(admin.ModelAdmin):
    pass


@admin.register(Post)
class PostAdmin(admin.ModelAdmin):
    pass


@admin.register(ReportReason)
class ReportReasonAdmin(admin.ModelAdmin):
    pass


@admin.register(Report)
class ReportAdmin(admin.ModelAdmin):
    readonly_fields = ("post", "reason", "ip")
    list_display = ("_post_thumbnail", "_post_subject", "_post_body")
    save_as = False

    def _post_thumbnail(self, obj):
        if obj.post.thumbnail:
            return mark_safe(f'<img src="{obj.post.thumbnail.url}" />')
        else:
            return None

    def _post_subject(self, obj):
        return obj.post.subject

    def _post_body(self, obj):
        return obj.post.text