db seed command

.gitignore

@@ -144,4 +144,4 @@ cython_debug/
 
 # End of https://www.toptal.com/developers/gitignore/api/python
 
-dev.db
+*.db

api/__init__.py

@@ -54,6 +54,7 @@ def register_shellcontext(app: Flask):
         """Shell context objects."""
         return {
             'db': db,
+            'TargetExchange': target_exchange.models.TargetExchange
         }
 
     app.shell_context_processor(shell_context)
@@ -63,3 +64,4 @@ def register_commands(app: Flask):
     """Register Click commands."""
     app.cli.add_command(commands.clean)
     app.cli.add_command(commands.urls)
+    app.cli.add_command(commands.seed)

api/commands.py

@@ -5,6 +5,8 @@ from flask import current_app
 from flask.cli import with_appcontext
 from werkzeug.exceptions import MethodNotAllowed, NotFound
 
+from .target_exchange.models import TargetExchange
+
 @click.command()
 def clean():
     """Remove *.pyc and *.pyo files recursively starting at current directory.
@@ -79,3 +81,11 @@ def urls(url, order):
 
     for row in rows:
         click.echo(str_template.format(*row[:column_length]))
+
+@click.command()
+@with_appcontext
+def seed():
+    """Seed the database"""
+
+    TargetExchange.ensure_created("")
+    TargetExchange.ensure_created("webhooks")

api/target_exchange/__init__.py

@@ -1,3 +1,3 @@
 """exchange management"""
 
-from . import views
+from . import views, models

api/target_exchange/models.py

@@ -6,5 +6,7 @@ class TargetExchange(SurrogatePK, Model):
     __tablename__ = "target-exchange"
     name = Column(db.String(255), unique=True, nullable=False)
 
-    def __init__(self, name, **kwargs) -> None:
+    @staticmethod
-        Model.__init__(self, name=name, **kwargs)
+    def ensure_created(name):
+        if TargetExchange.query.filter_by(name=name).first() is None:
+            TargetExchange(name=name).save()