eman19-meet / y2l-databases

Y2 2018 Yearlong: Databases

Before you start: Fork and clone this repository

1. Fork this repository by clicking "Fork" on this page:

2. Copy this repository's url by clicking the green clone button:

Part 1: Defining The Products Table

1. Open models.py and create the products class (Table). Make sure to include at least 5 attributes of your choice (i.e. price, quantity, description).

2. Open the terminal, navigate to your folder from the terminal (cd y2l...) then start a terminal and import everything from the models.py file (from models import *) use that to create Product instance.

3. Show your work to an instructor or a TA.

Part 2: Database writes

2.1 Creating objects

1. Create a function in databases.py that adds a product to the database.

2. Call this function to add your first object to the database.

If you open the folder you can notice that there's a new file called lecture.db in which all the data is stored (Your database).

3. • Open the python shell (by running python in your terminal)
   • Import the create_product function (from databases import create_product)
   • Call the create_prodduct function with the inputs you defined in the databases.py file
   • print the database using this command line python print_database.py lecture.db to check if you successfully added the object.

2.2 Deleting from a database

1. Create a function in databases.py that deletes one product of your choice.

2. Call this function.

3. • Open the python shell (by running python in your terminal)
   • Import the delete_product function (from databases import delete_product)
   • Call the delete_prodduct function with the inputs you defined in the databases.py file
   • print the database using this command line python print_database.py lecture.db to check if you successfully deleted the object.

2.3 Updating objects

1. Create a function in databases.py that updates 2 attributes of a product from the database.

2. Call this function.

3. • Open the python shell (by running python in your terminal)
   • Import the delete_product function (from databases import delete_product)
   • Call the delete_prodduct function with the inputs you defined in the databases.py file
   • print the database using this command line python print_database.py lecture.db to check if you successfully updated the object.

Extra: Add a maximium for price

If a user tries to create (or update) a product with a price that's more than "300", throw and error saying that the price is too high

Part 3: Database Reads

1. Create a function in databases.py that gets the first product from the Prodcuts table in your database and returns it.

2. Call this function and print the product.

3. Run databases.py and check whether it printed the object or not.

4. Now that you have the basic CRUD (Create/Read/Update/Delete) functions fully working:

• Copy the models.py and database.py files to the folder last week's flask lab.
• Import functions from the databases.py file
• Change the app.py file to use the import functions and display the details about the first product in the database in "shop.html" page. (Guide: in models.py file, in the routing function for "shop.html" use the retrieve function to get the product, and then pass it to the html page.)

5 Now, instead of displaying only the first product make it display all the products. Note that you need to deal with lists this time. Good luck.

Extra: Displaying Images

Congratulations! If you reached this phase of the lab then you're doing great. Since you are so smart and a database expert now, add an attribute called image to the Product model and have your product details page from last lab display the product's image

Extra: Displaying The Products

Create a search box in your page that allows you to search a product by it's name. Extra extra: make your search work if the user provides only the first part of the keyword. (Exampel if user write "key" and there's a product with name "keyboard" a result should be returned)