Populate the demo project with defaults.

Fixes #609

ihatemoney/models.py

@@ -10,11 +10,13 @@ from itsdangerous import (
     TimedJSONWebSignatureSerializer,
     URLSafeSerializer,
 )
+
 import sqlalchemy
 from sqlalchemy import orm
 from sqlalchemy.sql import func
 from sqlalchemy_continuum import make_versioned, version_class
 from sqlalchemy_continuum.plugins import FlaskPlugin
+from werkzeug.security import generate_password_hash
 
 from ihatemoney.patch_sqlalchemy_continuum import PatchedBuilder
 from ihatemoney.versioning import (
@@ -330,6 +332,49 @@ class Project(db.Model):
     def __repr__(self):
         return f"<Project {self.name}>"
 
+    @staticmethod
+    def create_demo_project():
+        project = Project(
+            id="demo",
+            name="demonstration",
+            password=generate_password_hash("demo"),
+            contact_email="demo@notmyidea.org",
+            default_currency="EUR",
+        )
+        db.session.add(project)
+        db.session.commit()
+
+        members = {}
+        for name in ("Amina", "Georg", "Alice"):
+            person = Person()
+            person.name = name
+            person.project = project
+            person.weight = 1
+            db.session.add(person)
+
+            members[name] = person
+
+        db.session.commit()
+
+        operations = (
+            ("Georg", 200, ("Amina", "Georg", "Alice"), "Food shopping"),
+            ("Alice", 20, ("Amina", "Alice"), "Beer !"),
+            ("Amina", 50, ("Amina", "Alice", "Georg"), "AMAP"),
+        )
+        for (payer, amount, owers, subject) in operations:
+            bill = Bill()
+            bill.payer_id = members[payer].id
+            bill.what = subject
+            bill.owers = [members[name] for name in owers]
+            bill.amount = amount
+            bill.original_currency = "EUR"
+            bill.converted_amount = amount
+
+            db.session.add(bill)
+
+        db.session.commit()
+        return project
+
 
 class Person(db.Model):
     class PersonQuery(BaseQuery):

ihatemoney/tests/tests.py

@@ -493,7 +493,12 @@ class BudgetTestCase(IhatemoneyTestCase):
         # test that a demo project is created if none is defined
         self.assertEqual([], models.Project.query.all())
         self.client.get("/demo")
-        self.assertTrue(models.Project.query.get("demo") is not None)
+        demo = models.Project.query.get("demo")
+        self.assertTrue(demo is not None)
+
+        self.assertEqual(["Amina", "Georg", "Alice"], [m.name for m in demo.members])
+        self.assertEqual(demo.get_bills().count(), 3)
+
 
     def test_deactivated_demo(self):
         self.app.config["ACTIVATE_DEMO_PROJECT"] = False

ihatemoney/web.py

@@ -541,11 +541,11 @@ def exit():
 @main.route("/demo")
 def demo():
     """
-    Authenticate the user for the demonstration project and redirect him to
+    Authenticate the user for the demonstration project and redirects to
     the bills list for this project.
 
     Create a demo project if it doesn't exists yet (or has been deleted)
-    If the demo project is deactivated, one is redirected to the create project form
+    If the demo project is deactivated, redirects to the create project form.
     """
     is_demo_project_activated = current_app.config["ACTIVATE_DEMO_PROJECT"]
     project = Project.query.get("demo")
@@ -553,15 +553,7 @@ def demo():
     if not project and not is_demo_project_activated:
         raise Redirect303(url_for(".create_project", project_id="demo"))
     if not project and is_demo_project_activated:
-        project = Project(
+        project = Project.create_demo_project()
-            id="demo",
-            name="demonstration",
-            password=generate_password_hash("demo"),
-            contact_email="demo@notmyidea.org",
-            default_currency="EUR",
-        )
-        db.session.add(project)
-        db.session.commit()
     session[project.id] = True
     return redirect(url_for(".list_bills", project_id=project.id))