Add Referral model

app/models.py

@@ -20,6 +20,7 @@ from app.config import (
     JOB_ONBOARDING_2,
     JOB_ONBOARDING_3,
     JOB_ONBOARDING_4,
+    LANDING_PAGE_URL,
 )
 from app.extensions import db
 from app.log import LOG
@@ -155,6 +156,10 @@ class User(db.Model, ModelMixin, UserMixin):
         db.Boolean, default=True, nullable=False, server_default="1"
     )
 
+    referral_id = db.Column(db.ForeignKey("referral.id"), nullable=True, default=None)
+
+    referral = db.relationship("Referral", foreign_keys=[referral_id])
+
     @classmethod
     def create(cls, email, name, password=None, **kwargs):
         user: User = super(User, cls).create(email=email, name=name, **kwargs)
@@ -1087,3 +1092,17 @@ class RefusedEmail(db.Model, ModelMixin):
 
     def __repr__(self):
         return f"<Refused Email {self.id} {self.path} {self.delete_at}>"
+
+
+class Referral(db.Model, ModelMixin):
+    """Referral code so user can invite others"""
+
+    user_id = db.Column(db.ForeignKey(User.id, ondelete="cascade"), nullable=False)
+
+    code = db.Column(db.String(128), unique=True, nullable=False)
+
+    def nb_user(self):
+        return User.filter_by(referral_id=self.id, activated=True).count()
+
+    def link(self):
+        return f"{LANDING_PAGE_URL}?slref={self.code}"

migrations/versions/2020_040922_ea30c0b5b2e3_.py

@@ -0,0 +1,42 @@
+"""empty message
+
+Revision ID: ea30c0b5b2e3
+Revises: 497cfd2a02e2
+Create Date: 2020-04-09 22:16:58.923473
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'ea30c0b5b2e3'
+down_revision = '497cfd2a02e2'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('referral',
+    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+    sa.Column('created_at', sqlalchemy_utils.types.arrow.ArrowType(), nullable=False),
+    sa.Column('updated_at', sqlalchemy_utils.types.arrow.ArrowType(), nullable=True),
+    sa.Column('user_id', sa.Integer(), nullable=False),
+    sa.Column('code', sa.String(length=128), nullable=False),
+    sa.ForeignKeyConstraint(['user_id'], ['users.id'], ondelete='cascade'),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('code')
+    )
+    op.add_column('users', sa.Column('referral_id', sa.Integer(), nullable=True))
+    op.create_foreign_key(None, 'users', 'referral', ['referral_id'], ['id'])
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(None, 'users', type_='foreignkey')
+    op.drop_column('users', 'referral_id')
+    op.drop_table('referral')
+    # ### end Alembic commands ###