https://github.com/ngunyigachie/concerts-code-challenge

https://github.com/ngunyigachie/concerts-code-challenge

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• Host: GitHub
• URL: https://github.com/ngunyigachie/concerts-code-challenge
• Owner: NgunyiGachie
• Created: 2024-06-14T06:50:51.000Z (7 months ago)
• Default Branch: Anthony
• Last Pushed: 2024-06-14T07:08:39.000Z (7 months ago)
• Last Synced: 2024-11-11T19:06:55.594Z (about 2 months ago)
• Language: Python
• Size: 10.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Object Relations Code Challenge - Concerts

For this assignment, we'll be working with a Concert domain.

We have three models: `Band`, `Concert`, and `Venue`.

For our purposes, a `Band` has many `Concerts`, a `Venue` has many `Concerts`s,

and a `Concert` belongs to a `Band` and to a `Venue`.

`Band` - `Venue` is a many to many relationship.

**Note**: You should draw your domain on paper or on a whiteboard _before you

start coding_. Remember to identify a single source of truth for your data.

## Topics

- Classes and Instances

- Class and Instance Methods

- Variable Scope

- Object Relationships

- lists and list Methods

## Instructions

To get started, run `pipenv install` while inside of this directory. Then run

`pipenv shell` to jump into the shell.

Build out all of the methods listed in the deliverables. The methods are listed

in a suggested order, but you can feel free to tackle the ones you think are

easiest. Be careful: some of the later methods rely on earlier ones.

**Remember!** This code challenge has `pytest` tests available to you. Run

`pytest` at any time from within your virtual environment.

We've provided you with another tool that you can use to test your code. To use

it, run `python debug.py` from the command line. This will start a `ipdb`

session with your classes defined. You can test out the methods that you write

here. You can add code to the `debug.py` file to define variables and create

sample instances of your objects.

Writing error-free code is more important than completing all of the

deliverables listed - prioritize writing methods that work over writing more

methods that don't work. You should test your code in the console as you write.

Similarly, messy code that works is better than clean code that doesn't. First,

prioritize getting things working. Then, if there is time at the end, refactor

your code to adhere to best practices. When you encounter duplicated logic,

extract it into a shared helper method.

**Before you submit!** Save and run your code to verify that it works as you

expect. If you have any methods that are not working yet, feel free to leave

comments describing your progress.

---

## Deliverables

Write the following properties and methods in the classes in the files provided.

Feel free to build out any helper methods if needed.

### Initializers and Properties

#### Band

- `Band __init__(self, name, hometown)`

  - Band is initialized with a name and hometown

- `Band property name`

  - Returns the band's name

  - Names must be of type `str`

  - Must be greater than zero characters

  - Should **be able** to change after the band is instantiated

- `Band property hometown`

  - Returns the band's hometown

  - Hometowns must be of type `str`

  - Must be greater than zero characters

  - Should **not be able** to change after the band is instantiated

  - _hint: hasattr()_

#### Venue

- `Venue __init__(self, name, city)`

  - Venue is initialized with a name and city

- `Venue property name`

  - Returns the venue's name

  - names must be of type `str`

  - Must be greater than zero characters

  - Should **be able** to change after the venue is instantiated

- `Venue property city`

  - Returns the venue's city

  - Cities must be of type `str`

  - Must be greater than zero characters

  - Should **be able** to change after the venue is instantiated

#### Concert

- `Concert __init__(self, date, band, venue)`

  - Concert is initialized with a date, a `Band` instance, and `Venue` instance

- `Concert property date`

  - Returns the concert's date

  - Dates must be of type `str`

  - Must be greater than zero characters

  - Should **be able** to change after the concert is instantiated

### Object Relationship Methods and Properties

#### Concert

- `Concert band`

  - Returns the `Band` instance for this concert

  - Must be of type `Band`

  - Should **be able** to change after the concert is instantiated

- `Concert venue`

  - Returns the `Venue` instance for this concert

  - Must be of type `Venue`

  - Should **be able** to change after the concert is instantiated

#### Venue

- `Venue concerts()`

  - Returns a list of all the concerts for the venue

  - Concerts must be of type `Concert`

  - Returns `None` if there are no concerts for that venue

- `Venue bands()`

  - Returns a **unique** list of all the bands for the venue

  - Bands must be of type `Band`

  - Returns `None` if there are no concerts for that venue

#### Band

- `Band property concerts()`

  - Returns a list of all the concerts that the band has played in

  - Concerts must be of type `Concert`

  - Returns `None` if there are no concerts for that band

- `Band property venues()`

  - Returns a **unique** list of all the venues that the band has played in

  - Venues must be of type `Venue`

  - Returns `None` if there are no concerts for that band

### Aggregate and Association Methods

#### Concert

- `Concert hometown_show()`

  - Returns `True` if the concert is in the band's hometown

  - Returns `False` if it is not

- `Concert introduction()`

  - Returns a string with the band's introduction for this concert

  - An introduction is in the form:

    `"Hello {insert city name here}!!!!! We are {insert band name here} and we're from {insert hometown here}"`

#### Band

- `Band play_in_venue(venue, date)`

  - Takes a `Venue` instance and a date as arguments

  - Creates and returns a new concert object for the band in that venue on that

    date

- `Band all_introductions()`

  - Returns a list of strings representing all the introductions for this band

  - Each introduction is in the form

    `"Hello {insert city name here}!!!!! We are {insert band name here} and we're from {insert hometown here}"`

  - Returns `None` if there are no concerts

### Bonus: Aggregate and Association Method

#### Venue

- `Venue concert_on(date)`

  - Takes a date (string) as argument

  - Finds and returns the first concert object on that date at that venue

  - Returns `None` if there is no concert on that date at that venue

  - Uncomment lines 136-146 in the venue_test file

### Bonus: For any invalid inputs raise an `Exception`.

- First, **comment out** the following lines

  - **band_test.py**

    - lines 26-27, 39-40, 60-62, 65-66, 82-83

  - **concert_test.py**

    - lines 27-28, 43-44, 65-66, and 100-101

  - **venue_test.py**

    - lines 24-25, 37-38, 60-61, and 73-74

- Then, **uncomment** the following lines in the test files

  - **band_test.py**

    - lines 30-31, 43-44, 69-70, 73-74, and 86-87

  - **concert_test.py**

    - lines 31-32, 47-48, 71-72, and 106-107

  - **venue_test.py**

    - lines 28-29, 41-42, 64-65, and 77-78