Main Software of credit cards handling using Lean Code principles and TDD methodologies
Sample using MVC pattern bound to postgresql also used Spring Boot Project Architecture:
Postgresql Database used on neon.tech
The double t in inittial commit, just forget it ahhahaha
by Sebastián Hernández Díaz
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First get an account in neon.tech and sign up
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Create a project, give it whatever name you want
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When you are in your project, go to dashboard
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In that page, you will see a blurred part in a code, click on it and then it would be a non-blurred text, that's your password, be careful
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Then, in the part that says 'psql', click on it, and the choose Django
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You will see something like this:
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DATABASES = { 'default': { 'ENGINE': 'django.db.backends.postgresql', 'NAME': 'neondb', 'USER': 'YOURUSER', 'PASSWORD': 'YOURPASSWORD', 'HOST': 'YOURHOST', 'PORT': 'YOURPORT', } }
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Then, go to the file Secret_Config-sample.py and refactor it as Secret_Config.py
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Then, in the code you will change the things as the following instructions:
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In DATABASE = "You will write what it says on NAME"
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In USER = "You will write what it says on USER"
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In PASSWORD = "You will write what it says on PASSWORD"
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In HOST = "ou will write what it says on HOST"
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In PORT = 5432 # BY DEFAULT IT IS 5432, BUT IT CAN CHANGE IN YOUR DB
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Go to the terminal and install Flask like this: pip install Flask
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After get done the software configuration right above, click on app.py and see the whole file
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Run it and in the terminal, it would create a link (Normally this one: http://127.0.0.1:5000)
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Click on it and open it in your browser (Please do it on Chrome)
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When you enter on the page, you will see a Not Found ERROR, Don't be afraid, its normal!
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In the app.py you will see a comment between """ TEXT_HERE """, in that comment, you will find a R1, R2, R3, R4, and right below a function
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The function will always start with @app.route('/HERE_GOES_A_WEB_ROUTE')
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You must provide a:
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card_number = XXXXXXXXXX Insert a card number Normally a number
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owner_id = XXXXXXXXX Insert an ID Normally a number
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owner_name = XXXXXXXXX Insert a name
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bank_name = XXXXXXXXX Insert the name of the bank where belong the credit card
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due_date = YYYY-MM-DD Insert the due date of the credit card in this way YEAR-MONTH-DAY
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franchise = XXXXXXXX Insert the franchise of the credit card
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payment_day = DD Insert the payment day of the credit card in this way DAY Normally a number
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monthly_fee = XXXXXXX Insert the monthly fee of the credit card Normally a number
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interest_rate = XXXXX Insert the interest rate Normally a number
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After put everything in his place, you will put it in the next path:
Copy the whole path and copy it on the search bar and click enter
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You must provide a:
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card_number = XXXXXXXXXX Insert a card number that you already registered in the database If the card number does'nt exists in the database it would show an error Normally a number
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purchase_amount = XXXXXXXXX Insert a purchase amount Normally a number
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payments = XXXXXXXXX Insert how many payments you will do Normally a number
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After put everything in his place, you will put it in the next path:
Copy the whole path and copy it on the search bar and click enter
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You must provide a:
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purchase_amount = XXXXXXXXXX Insert a purchase amount Normally a number
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monthly_payment = XXXXXXXXX Insert a monthly payment Normally a number
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interest_rate = XXXXX Insert the interest rate Normally a number
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After put everything in his place, you will put it in the next path:
Copy the whole path and copy it on the search bar and click enter
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You must provide a:
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card_number = XXXXXXXXXX Insert a card number that you already registered in the database If the card number does'nt exists in the database it would show an error Normally a number
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purchase_amount = XXXXXXXXXX Insert a purchase amount Normally a number
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purchase_date = YYYY-MM-DD Insert the due date of the credit card in this way YEAR-MONTH-DAY
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payments = XXXXXXXXX Insert how many payments you will do Normally a number
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After put everything in his place, you will put it in the next path:
Copy the whole path and copy it on the search bar and click enter
- You must provide a:
- card_number = XXXXXXXXXX Insert a card number that you already registered in the database If the card number does'nt exists in the database it would show an error Normally a number
- Go to the file app.py
- Click on run
- In the terminal you will see a link (Normally this one: http://127.0.0.1:5000)
- Click on it, and open it in your browser
- Try the app!!