List display configuration in Django - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the list display to show the 'title' field in Django admin.

Django

class BookAdmin(admin.ModelAdmin):
    list_display = ('[1]',)

Drag options to blanks, or click blank then click option'

Aisbn

Bauthor

Cdate

Dtitle

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put the field name in quotes.

Using a field name that does not exist in the model.

The list_display attribute controls which fields show in the admin list view. Here, 'title' is the correct field to display.

2fill in blank

medium

Complete the code to add 'author' to the list display in Django admin.

Django

class BookAdmin(admin.ModelAdmin):
    list_display = ('title', '[1]')

Drag options to blanks, or click blank then click option'

Aauthor

Bdate

Cpublisher

Disbn

Attempts:

3 left

💡 Hint

Common Mistakes

Using a field name not defined in the model.

Forgetting the comma between tuple items.

Adding 'author' to list_display shows the author field in the admin list view alongside title.

3fill in blank

hard

Fix the error in the list_display tuple to correctly show 'title' and 'author'.

Django

class BookAdmin(admin.ModelAdmin):
    list_display = ('title'[1]'author')

Drag options to blanks, or click blank then click option'

A+

B;

C,

Dand

Attempts:

3 left

💡 Hint

Common Mistakes

Using plus or other operators instead of commas.

Missing commas causing syntax errors.

Tuple items must be separated by commas. Without a comma, Python syntax is invalid.

4fill in blank

hard

Fill both blanks to configure list_display to show 'title' and 'published_date'.

Django

class BookAdmin(admin.ModelAdmin):
    list_display = ('[1]', '[2]')

Drag options to blanks, or click blank then click option'

Atitle

Bauthor

Cpublished_date

Disbn

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect field names.

Forgetting to put field names in quotes.

The list_display tuple includes the fields 'title' and 'published_date' to show both in the admin list.

5fill in blank

hard

Fill all three blanks to configure list_display to show 'title', 'author', and 'isbn'.

Django

class BookAdmin(admin.ModelAdmin):
    list_display = ('[1]', '[2]', '[3]')

Drag options to blanks, or click blank then click option'

Apublished_date

Bauthor

Cisbn

Dtitle

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up field names or misspelling them.

Omitting commas between fields.

The list_display tuple includes 'title', 'author', and 'isbn' to show these fields in the admin list view.

Practice

1. In Django admin, what does the list_display attribute control?

easy

A. Which fields or methods appear as columns in the admin list view

B. The order of models in the admin site

C. The fields editable in the admin form

D. The database table names for models

Solution

1. Step 1: Understand the purpose of list_display

   The list_display attribute in Django admin defines which model fields or methods are shown as columns in the list view of the admin interface.

2. Step 2: Differentiate from other admin attributes

   Other attributes like ordering control order, fields control form fields, and database table names are unrelated to list_display.

3. Final Answer:

   Which fields or methods appear as columns in the admin list view -> Option A

4. Quick Check:

   list_display = columns shown [OK]

Hint: Remember: list_display = columns in admin list view [OK]

Common Mistakes:

• Confusing list_display with ordering or form fields
• Thinking list_display changes database schema
• Assuming list_display controls permissions

2. Which of the following is the correct way to set list_display in a Django admin class?

easy

A. list_display = 'field1, field2, method_name'

B. list_display = (field1, field2, method_name)

C. list_display = {'field1', 'field2', 'method_name'}

D. list_display = ['field1', 'field2', 'method_name']

Solution

1. Step 1: Identify the correct data type for list_display

   The list_display attribute expects a list or tuple of strings naming fields or methods. Both list and tuple are valid, but list is most common.

2. Step 2: Analyze each option's syntax

   list_display = ['field1', 'field2', 'method_name'] uses a list with square brackets and strings, which is correct. list_display = (field1, field2, method_name) uses tuple syntax but lacks quotes around the names, treating them as undefined variables (NameError). list_display = {'field1', 'field2', 'method_name'} uses a set, which is unordered and invalid here. list_display = 'field1, field2, method_name' is a string, which is incorrect.

3. Final Answer:

   list_display = ['field1', 'field2', 'method_name'] -> Option D

4. Quick Check:

   list_display uses list syntax [OK]

Hint: Use square brackets for list_display fields [OK]

Common Mistakes:

• Using a string instead of a list or tuple
• Using a set which is unordered
• Forgetting quotes around field names

3. Given this Django admin code snippet, what columns will appear in the admin list view?

class ProductAdmin(admin.ModelAdmin):
    list_display = ['name', 'price', 'discounted_price']

    def discounted_price(self, obj):
        return obj.price * 0.9

medium

A. Columns: name, price, discounted_price but discounted_price shows an error

B. Columns: name, price only; discounted_price is ignored

C. Columns: name, price, discounted_price showing name, price, and 90% of price

D. Only discounted_price column appears

Solution

1. Step 1: Understand list_display with methods

   The list_display includes 'discounted_price', which is a method defined in the admin class. Django calls this method for each object to show the computed value.

2. Step 2: Analyze the method's return value

   The method returns 90% of the product's price, so the column will show the discounted price correctly.

3. Final Answer:

   Columns: name, price, discounted_price showing name, price, and 90% of price -> Option C

4. Quick Check:

   Method in list_display shows computed column [OK]

Hint: Methods in list_display show computed columns [OK]

Common Mistakes:

• Assuming methods in list_display are ignored
• Forgetting to define the method in admin
• Method returning wrong or no value

4. What is wrong with this Django admin code?

class OrderAdmin(admin.ModelAdmin):
    list_display = ['id', 'total_price', 'calculate_tax']

    def calculate_tax(self):
        return self.total_price * 0.1

medium

A. calculate_tax should be a property, not a method

B. The method calculate_tax is missing the obj parameter

C. total_price is not a valid field

D. list_display should not include methods

Solution

1. Step 1: Check method signature for list_display methods

   Methods used in list_display must accept the model instance as the first parameter, usually named obj. Here, calculate_tax has no parameters, so it will cause an error.

2. Step 2: Confirm other options

   Methods can be in list_display, total_price is assumed valid, and methods do not have to be properties.

3. Final Answer:

   The method calculate_tax is missing the obj parameter -> Option B

4. Quick Check:

   list_display methods need obj parameter [OK]

Hint: list_display methods must accept obj parameter [OK]

Common Mistakes:

• Defining method without obj parameter
• Thinking methods can't be in list_display
• Confusing method with property decorator

5. You want to show a custom column in Django admin that displays 'Yes' if a product's stock is above 0, otherwise 'No'. Which is the correct way to add this to list_display?

hard

A. Define a method in admin: def in_stock(self, obj): return 'Yes' if obj.stock > 0 else 'No' and add 'in_stock' to list_display

B. Add 'in_stock' to list_display without defining a method

C. Override the model's __str__ method to return 'Yes' or 'No'

D. Use a property on the model named in_stock

Solution

1. Step 1: Create a method in admin for custom display

   To show a custom column based on logic, define a method in the admin class that takes self and obj and returns the desired string.

2. Step 2: Add the method name as a string to list_display

   Adding the method name to list_display tells Django to call it for each row and show the result.

3. Final Answer:

   Define a method in admin: def in_stock(self, obj): return 'Yes' if obj.stock > 0 else 'No' and add 'in_stock' to list_display -> Option A

4. Quick Check:

   Custom columns need admin methods + list_display [OK]

Hint: Custom columns need admin methods and list_display entry [OK]

Common Mistakes:

• Adding method name without defining it
• Trying to use model __str__ for columns
• Assuming properties on model auto-show in list_display