Implement Subscription Creation View with Funding Validation [56-4]

[mehalyna]

Implement Subscription Creation View with Funding Validation

As an Investor,
I want to subscribe to a startup project by contributing funds,
so that I can help the startup reach its funding goals.

Technical Task:

• Create a view for subscription creation:

  • Build a new view (SubscriptionCreateView) using Django Rest Framework (DRF) that handles incoming requests to create new subscriptions for a project.
  • Ensure the view checks the total funding received for the project and validates that the new subscription can be accepted.
  • Ensure that the investment_share or monetary amount is subtracted from the remaining funding available.

• Notes:

  • This view should require the user to be authenticated and have an investor role.
  • After successful creation, return the updated funding status of the project to show how much is left.

Acceptance Criteria:

• Subscriptions can be successfully created by authenticated investors.
• Investors cannot subscribe to fully funded projects.
• The response includes the remaining available funding for the project.

US #56