add notification_history table

table will be used for storing archival versions of notifications. It's an exact duplicate of notifications table, but with the following modifications:
* removed _personalisation
* removed to
* removed content_char_count

All foreign keys to other tables still exist. additionally, removed defaults (for id and created_at) since they'll be set when we create, and we should ensure that we don't forget about them when inserting/udpating this table.

app/models.py

@@ -332,7 +332,7 @@ class VerifyCode(db.Model):
 
 NOTIFICATION_STATUS_TYPES = ['created', 'sending', 'delivered', 'pending', 'failed',
                              'technical-failure', 'temporary-failure', 'permanent-failure']
-
+NOTIFICATION_STATUS_TYPES_ENUM = db.Enum(*NOTIFICATION_STATUS_TYPES, name='notify_status_type')
 
 class Notification(db.Model):
 
@@ -370,8 +370,7 @@ class Notification(db.Model):
         unique=False,
         nullable=True,
         onupdate=datetime.datetime.utcnow)
-    status = db.Column(
+    status = db.Column(NOTIFICATION_STATUS_TYPES_ENUM, nullable=False, default='created')
-        db.Enum(*NOTIFICATION_STATUS_TYPES, name='notify_status_type'), nullable=False, default='created')
     reference = db.Column(db.String, nullable=True, index=True)
     _personalisation = db.Column(db.String, nullable=True)
 
@@ -387,6 +386,30 @@ class Notification(db.Model):
             self._personalisation = encryption.encrypt(personalisation)
 
 
+class NotificationHistory(db.Model):
+    __tablename__ = 'notification_history'
+
+    id = db.Column(UUID(as_uuid=True), primary_key=True)
+    job_id = db.Column(UUID(as_uuid=True), db.ForeignKey('jobs.id'), index=True, unique=False)
+    job = db.relationship('Job')
+    job_row_number = db.Column(db.Integer, nullable=True)
+    service_id = db.Column(UUID(as_uuid=True), db.ForeignKey('services.id'), index=True, unique=False)
+    service = db.relationship('Service')
+    template_id = db.Column(UUID(as_uuid=True), db.ForeignKey('templates.id'), index=True, unique=False)
+    template = db.relationship('Template')
+    template_version = db.Column(db.Integer, nullable=False)
+    api_key_id = db.Column(UUID(as_uuid=True), db.ForeignKey('api_keys.id'), index=True, unique=False)
+    api_key = db.relationship('ApiKey')
+    key_type = db.Column(db.String, db.ForeignKey('key_types.name'), index=True, unique=False, nullable=False)
+    notification_type = db.Column(notification_types, nullable=False)
+    created_at = db.Column(db.DateTime, index=False, unique=False, nullable=False)
+    sent_at = db.Column(db.DateTime, index=False, unique=False, nullable=True)
+    sent_by = db.Column(db.String, nullable=True)
+    updated_at = db.Column(db.DateTime, index=False, unique=False, nullable=True)
+    status = db.Column(NOTIFICATION_STATUS_TYPES_ENUM, nullable=False, default='created')
+    reference = db.Column(db.String, nullable=True, index=True)
+
+
 INVITED_USER_STATUS_TYPES = ['pending', 'accepted', 'cancelled']
 
 

migrations/versions/0041_notification_history.py

@@ -0,0 +1,60 @@
+"""empty message
+
+Revision ID: 807f0b497157
+Revises: 0039_fix_notifications
+Create Date: 2016-07-07 13:15:35.503107
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '807f0b497157'
+down_revision = '0039_fix_notifications'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('notification_history',
+    sa.Column('id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.Column('job_id', postgresql.UUID(as_uuid=True), nullable=True),
+    sa.Column('job_row_number', sa.Integer(), nullable=True),
+    sa.Column('service_id', postgresql.UUID(as_uuid=True), nullable=True),
+    sa.Column('template_id', postgresql.UUID(as_uuid=True), nullable=True),
+    sa.Column('template_version', sa.Integer(), nullable=False),
+    sa.Column('api_key_id', postgresql.UUID(as_uuid=True), nullable=True),
+    sa.Column('key_type', sa.String(), nullable=False),
+    sa.Column('notification_type', sa.Enum('email', 'sms', 'letter', name='notification_type'), nullable=False),
+    sa.Column('created_at', sa.DateTime(), nullable=False),
+    sa.Column('sent_at', sa.DateTime(), nullable=True),
+    sa.Column('sent_by', sa.String(), nullable=True),
+    sa.Column('updated_at', sa.DateTime(), nullable=True),
+    sa.Column('status', sa.Enum('created', 'sending', 'delivered', 'pending', 'failed', 'technical-failure', 'temporary-failure', 'permanent-failure', name='notify_status_type'), nullable=False),
+    sa.Column('reference', sa.String(), nullable=True),
+    sa.ForeignKeyConstraint(['api_key_id'], ['api_keys.id'], ),
+    sa.ForeignKeyConstraint(['job_id'], ['jobs.id'], ),
+    sa.ForeignKeyConstraint(['key_type'], ['key_types.name'], ),
+    sa.ForeignKeyConstraint(['service_id'], ['services.id'], ),
+    sa.ForeignKeyConstraint(['template_id'], ['templates.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_notification_history_api_key_id'), 'notification_history', ['api_key_id'], unique=False)
+    op.create_index(op.f('ix_notification_history_job_id'), 'notification_history', ['job_id'], unique=False)
+    op.create_index(op.f('ix_notification_history_key_type'), 'notification_history', ['key_type'], unique=False)
+    op.create_index(op.f('ix_notification_history_reference'), 'notification_history', ['reference'], unique=False)
+    op.create_index(op.f('ix_notification_history_service_id'), 'notification_history', ['service_id'], unique=False)
+    op.create_index(op.f('ix_notification_history_template_id'), 'notification_history', ['template_id'], unique=False)
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_notification_history_template_id'), table_name='notification_history')
+    op.drop_index(op.f('ix_notification_history_service_id'), table_name='notification_history')
+    op.drop_index(op.f('ix_notification_history_reference'), table_name='notification_history')
+    op.drop_index(op.f('ix_notification_history_key_type'), table_name='notification_history')
+    op.drop_index(op.f('ix_notification_history_job_id'), table_name='notification_history')
+    op.drop_index(op.f('ix_notification_history_api_key_id'), table_name='notification_history')
+    op.drop_table('notification_history')
+    ### end Alembic commands ###