Django Level Two

Question 1

what do we use o tie a database to a Django Project?

Answer 1

Models

Question 2

What backend engine comes with django? is the only one you can use?

Answer 2

SQLite

no

Question 3

Each attribute of a Model class represents a …

Answer 3

field

Question 4

SQL operates like a …

Answer 4

giant table

Question 5

What is a field constraint?

Answer 5

an argument passed into a field method that limits something.

Question 6

Tables can reference each other using the concepts of ___ and ___.

Answer 6

Foreign Keys and Primary Keys.

Question 7

__: a unique identifier for each row in a table

Answer 7

Primary Key

Question 8

___: denotes that the column coincides with a primary key of another table.

Answer 8

Foreign Key

Question 9

The migrate command:

Answer 9

python manage.py migrate

Question 10

command to register migrations changes to the app?

Answer 10

python manage.py makemigrations app1

Question 11

What must we do to interact with models using the admin interface?

Answer 11

We must register them to the app’s admin.py file

Question 12

A ___ needs to be created to be able to use the Admin features.

Answer 12

superuser

Question 13

Command for creating a superuser.

Answer 13

python manage.py createsuperuser

Question 14

The name of the model(class) is synonymous to the name of …

Answer 14

the data-table to be created.

Question 15

every model (class) inherits from …

Answer 15

the Django base class models.Model

Question 16

Every attribute aka field, must have its field type specified by …

Answer 16

instantiating it using django’s built in field classes

Question 17

A constraint of the charfield that limits the amount of characters that can be inserted into the Topic model.

Answer 17

max_length

Question 18

a kwarg constraint the limits the presence of duplicates.

Answer 18

unique=true

Question 19

What args get passed into a ForeignKey method?

Answer 19

1. The name of the model that it is connected to
2. what to do in the case that the associated Model gets deleted.

Question 20

should you always include a string representation of every model you create?

Answer 20

YES

Question 21

What package did we learn to use to populate models with fake data? how do we install this package?

Answer 21

Faker

Pip install Faker

Question 22

List the high level steps for population your website with fake data using Faker.

Answer 22

1. configure the project settings to allow for models to be manipulated
2. import and set django up
3. import all the functions and models needed
4. import Faker and instatiate it
5. create functions that add data that you generated
6. create a function that uses the instatiated Faker object to create however much fake data
7. use if __name__ == ‘__main__’ to tell the script when to run

Question 23

What would be the syntax for creating a fake object using faker?

Answer 23

Question 24

what does the function .get_or_create() do? what are its args?

Answer 24

.get_or_create() will retrieve the field if it already exists in the model, and if not it will create it.

it is composed of an arbitrary number of kwargs, matching the models field object with the instance of fake data that was generated for that field.

Question 25

for loop syntax for running an operation N times?

Answer 25

for entry in range(N):

Question 26

syntax for the if statement tells python to execute the nested instructions if the file is ran directly

Answer 26

if \_\_name\_\_ == '\_\_main\_\_'

Question 27

What are the five points of the MTV paradigm?

Answer 27

1. import models into views.py 2. extract data from the models using the views functions 3. pass the data into the html template 4. edit the html template to receive the data and present it to the user appropriately 5. Map a URL to the view.

Question 28

render gets imported from \_\_\_.

Answer 28

django.shortcuts

Question 29

HttpResponse gets imported from \_\_\_.

Answer 29

django.http

Question 30

Models get imported from \_\_\_.

Answer 30

app\_name.models

Question 31

What is the syntax for grabbing infor from a model that is ordered by a certain field of the model?

Answer 31

Question 32

what is the syntax for the HTML equivalent of an if statement?

Answer 32

{% if *condition* %} ... {% endif %}

Question 33

what is the syntax for the HTML equivalent of a for loop?

Answer 33

{% for *iteration* in *iterable* %} ... {% endfor %}

Question 34

tag heirarchy for tables in html.

Answer 34

* table - table * thead - head of a table * th - Item in the table head * tr - row of a table * td - item in that row