Django Level Five

Question 1

which password hashers did we install?

Answer 1

argon2: pip install django[argon2]
bcrypt: pip install bcrypt

Question 2

to use a password hasher, it must be added to the ____ in settings.py

Answer 2

PASSWORDS_HASHERS list

Question 3

syntax for adding an option to a password validator

Answer 3

Question 4

What is the difference between static files and media files?

Answer 4

content that you provide (static) versus content that your user provides (media)

Question 5

code for setting up static and media directories.

Answer 5

Question 6

what library must be installed in order to work with images?

Answer 6

the python imaging library:

pip install pillow

Question 7

always remember to register models that you want admin control over to the ___

Answer 7

admin.py file

Question 8

Broad steps for creating a UserProfileInfo() model

Answer 8

1. import models and User
2. define the class
3. instatiate the user field which uses the imported User model as its base by way of the .OneToOneField() method
4. add additional fields to the UserProfileInfo model
5. def a string representation of the model

Question 9

what does the on_delete=models.cascade mean as an argument in a OneToOneField() or ForeignKey()?

Answer 9

When the referenced model is deleted, also delete other model instances that referenced it.

Question 10

what does the blank=true mean as an argument in a FieldClass?

Answer 10

Information for that field can remain blank

Question 11

When using an ImageField() class, how does it know where the file should be stored?

Answer 11

add the kwarg: upload_to=’profile_pics’

Question 12

List the broad steps for creating a Form class in forms.py

Answer 12

1. import forms, User, and UserProfileInfo from their respective sources

2. define the class
3. add any fields that are not already present in the model that we are creating a form for (this step can be skipped).
4. define a class Meta() with model equal to the mode we are basing the form off of, and the fields from that model (and the form class) that we want to add to the form.

Question 13

what is the code for adding a password input widget to a Form class?

Answer 13

Question 14

what are the heirarchy of tags when creating a navbar?

Answer 14

• nav
  
  • div
    
    • ul
      
      • li
      • li
      • li

Question 15

how do you change how each button in a navbar looks?

Answer 15

Question 16

List the broad steps for creating a registration form in an html file (dont worry about styling).

Answer 16

1. check if the user is registered
2. If the user is not registered display the form using template tags and the csrf_token
3. add a submit button

Question 17

it may be good practice to place a form inside of what kind of div class value?

Answer 17

jumbotron

Question 18

for the form tag, what should the two attributes be, what are they equal to, and what is their purpose?

Answer 18

enctype=”multipart/form-data”

• needed since we are uploading multimedia images

method=”POST”

• tells Django that submission of this form yields a post request.

Question 19

List the broad steps for creating the register view function.

Answer 19

1. import render from django.shortcuts and import the UserProfileInfoForm
2. initialize the registered value to equal false
3. with an if statement give instructions for the request being a “POST” which is to pull (instantiate) the data entered into the forms. if not a “POST” request, we will get back the empty forms.
4. with a nest if statement check for validation of the instantiated forms. will print error reports if validation fails.
5. save all the data entered into the form using the appropriate statements and flip registered to equal True
6. return a render with the dictionary containing all the variables needed for the html file.

Question 20

what does request.method == “POST” mean?

Answer 20

• The user submitted a form that they filled
• No we need to do something with the provided information

Question 21

what method checks for the validity of a form?

Answer 21

.is_valid()

Question 22

how do we hash and save the user password?

Answer 22

user.password ultimately comes from the password that we entered into the form.

Question 23

why would we ever pass the kwarg commit=False into a save() method?

Answer 23

If we want to hold off on saving in the case that contradictions arise.

Question 24

what is this line of code doing?

profile.user = user

Answer 24

it is establishing that OneToOne relationship referenced earlier in models.py

Question 25

What is this block of code saying?

Answer 25

if a profile_pic was submitted with the request,

set the profile_pic attribute of the profile to equal whatever was submitted.

Question 26

How do you estalbish a login url?

Answer 26

in settings.py,

Question 27

What are the crucial components of a login html file?

Answer 27

• form tag(s)
• csrf_token
• label and input tags for the Username, and Password entry with ‘for’ and ‘name’ matching.
  
  • type=’text’ for Username
  • type=’password’ for Password
• an input tag for the submit button

Question 28

list the sequential operations done in the user_login view function.

Answer 28

• if “POST”
  
  • instantiate username and password using POST.get(‘ ‘)
  • authenticate the user
  • if there is a user
    
    • if the user is active
      
      • log them in and take them back to the index
    • else user not active
      
      • report that the account is not active
  • else (no user)
    
    • print an invaled login details report
• else (no “POST”)
  
  • render the page normally

Question 29

for the login view:

how do you instantiate username and password using POST.get(‘ ‘)

Answer 29

Question 30

In the login view:

How do you authenticate a user?

Answer 30

Question 31

In the user_login view how do you:

log the user in and return them to the index page?

Answer 31

62-64

Question 32

In the user_login view how do you:

report that the account is not active?

Answer 32

66-67

Question 33

In the user_login view how do you:

print login failure messages to the console and to be displayed in the browser.

Answer 33

69-72

Question 34

describe the logout view

Answer 34

• login required decorator
• logout function with request arg
• return statement that takes the user back to the index page

Question 35

code for adding a navbar link for longing in or logging out?

Answer 35

• if user is authenticated
  
  • the last navbar item is a logout link
• else (user not authenticate)
  
  • the last navbar item is a login link