What is Django Admin Panel and how do you customize it? Django Admin Panel क्या है और इसे customize कैसे करते हैं?

Django Admin is an auto-generated CRUD interface for managing database records. Register models in admin.py to expose them. Customize with ModelAdmin to control display, filtering, search, and actions without writing additional code.

// admin.py - Basic Setup
from django.contrib import admin
from .models import Product, Category

// Register model with default admin
admin.site.register(Product)
admin.site.register(Category)

// Customized Admin
from django.contrib.admin import ModelAdmin, register
from django.utils.html import format_html

@register(Product)
class ProductAdmin(ModelAdmin):
    # Display fields in list view
    list_display = ['id', 'name', 'category', 'price', 'quantity', 'status_display', 'created_at']
    
    # Add search
    search_fields = ['name', 'description', 'category__name']
    
    # Add filters
    list_filter = ['category', 'is_active', 'created_at']
    
    # Fields to edit inline
    readonly_fields = ['created_at', 'updated_at', 'color_preview']
    
    # Organize edit form
    fieldsets = (
        ('Product Information', {
            'fields': ('name', 'description', 'category')
        }),
        ('Pricing & Inventory', {
            'fields': ('price', 'quantity')
        }),
        ('Status & Metadata', {
            'fields': ('is_active', 'created_by', 'created_at', 'updated_at'),
            'classes': ('collapse',)  # Collapsible section
        }),
    )
    
    # Inline editing for related objects
    class ProductImageInline(admin.TabularInline):
        model = ProductImage
        extra = 1  # How many empty forms to show
    
    inlines = [ProductImageInline]
    
    # Pagination
    list_per_page = 50
    
    # Sort by default
    ordering = ['-created_at']
    
    # Custom methods for display
    def status_display(self, obj):
        color = 'green' if obj.is_active else 'red'
        status = 'Active' if obj.is_active else 'Inactive'
        return format_html(
            '<span style="color: {};">{}</span>',
            color, status
        )
    status_display.short_description = 'Status'
    
    def color_preview(self, obj):
        return format_html(
            '<div style="width:50px;height:50px;background-color:{}"></div>',
            obj.color_code
        )
    color_preview.short_description = 'Color Preview'
    
    # Custom actions
    def make_active(self, request, queryset):
        updated = queryset.update(is_active=True)
        self.message_user(request, f'{updated} products activated')
    make_active.short_description = 'Mark selected as active'
    
    def make_inactive(self, request, queryset):
        queryset.update(is_active=False)
    make_inactive.short_description = 'Mark selected as inactive'
    
    actions = ['make_active', 'make_inactive']
    
    # Override save method
    def save_model(self, request, obj, form, change):
        if not change:  # New object
            obj.created_by = request.user
        super().save_model(request, obj, form, change)
    
    # Custom queryset for non-superusers
    def get_queryset(self, request):
        qs = super().get_queryset(request)
        if not request.user.is_superuser:
            qs = qs.filter(created_by=request.user)
        return qs

// Admin site customization
from django.contrib import admin

admin.site.site_header = 'My Store Administration'
admin.site.site_title = 'My Store Admin'
admin.site.index_title = 'Welcome to Admin Panel'

// Access admin
// 1. Create superuser
python manage.py createsuperuser

// 2. Navigate to http://localhost:8000/admin/

// Common ModelAdmin options
// list_display - Columns in list
// search_fields - Searchable fields
// list_filter - Sidebar filters
// readonly_fields - Non-editable fields
// fieldsets - Form organization
// inlines - Related object editing
// list_per_page - Pagination
// ordering - Default sort
// actions - Bulk actions