adds target-exchange and initial migrations

api/__init__.py

@@ -1,5 +1,5 @@
 from flask import Flask, Blueprint
-from . import commands, login
+from . import commands, login, target_exchange
 from .settings import ProdConfig, Config
 from .extensions import db, migrate, jwt
 from .exceptions import ApiException
@@ -35,6 +35,7 @@ def register_blueprints(app: Flask):
     api_blueprint = Blueprint('api', __name__, url_prefix='/api')
 
     api_blueprint.register_blueprint(login.views.blueprint, url_prefix='/login')
+    api_blueprint.register_blueprint(target_exchange.views.blueprint, url_prefix='/target-exchange')
 
     app.register_blueprint(api_blueprint)
 

api/exceptions.py

@@ -14,8 +14,8 @@ class ApiException(Exception):
         return rv
 
 class NotFoundException(ApiException):
-    def __init__(self, message) -> None:
-        super().__init__(404, message)
+    def __init__(self, entity_name) -> None:
+        super().__init__(404, f'{entity_name} could not be found')
 
 class BadRequestException(ApiException):
     def __init__(self, message) -> None:

api/target_exchange/__init__.py

@@ -0,0 +1,3 @@
+"""exchange management"""
+
+from . import views

api/target_exchange/models.py

@@ -0,0 +1,10 @@
+from api.database import (Model, SurrogatePK, db,
+                          Column, reference_col, relationship)
+
+
+class TargetExchange(SurrogatePK, Model):
+    __tablename__ = "target-exchange"
+    name = Column(db.String(255), unique=True, nullable=False)
+
+    def __init__(self, name, **kwargs) -> None:
+        Model.__init__(self, name=name, **kwargs)

api/target_exchange/serializers.py

@@ -0,0 +1,8 @@
+from marshmallow import Schema, fields
+
+class TargetExchangeSchema(Schema):
+    id = fields.Int()
+    name = fields.Str()
+
+target_exchange_schema = TargetExchangeSchema()
+target_exchanges_schema = TargetExchangeSchema(many=True)

api/target_exchange/views.py

@@ -0,0 +1,49 @@
+from flask import Blueprint
+from flask_jwt_extended import jwt_required
+from flask_apispec import use_kwargs, marshal_with
+
+from api.exceptions import NotFoundException
+
+from .models import TargetExchange
+from .serializers import target_exchange_schema, target_exchanges_schema
+
+blueprint = Blueprint('target_exchange', __name__)
+
+
+@blueprint.route('', methods=['GET'])
+@jwt_required()
+@marshal_with(target_exchanges_schema)
+def get_list():
+    return TargetExchange.query.all()
+
+
+@blueprint.route('', methods=['POST'])
+@jwt_required()
+@use_kwargs(target_exchange_schema)
+@marshal_with(target_exchange_schema)
+def create(name):
+    target_exchange = TargetExchange(name=name)
+    target_exchange.save()
+    return target_exchange
+
+
+@blueprint.route('/<id>', methods=['GET'])
+@jwt_required()
+@marshal_with(target_exchange_schema)
+def get_by_id(id):
+    target_exchange = TargetExchange.get_by_id(id)
+    if target_exchange is not None:
+        return target_exchange
+    else:
+        return NotFoundException(__name__)
+
+@blueprint.route('/<id>', methods=['PUT'])
+@jwt_required()
+@use_kwargs(target_exchange_schema)
+@marshal_with(target_exchange_schema)
+def update(id, **kwargs):
+    target_exchange = TargetExchange.get_by_id(id)
+    if target_exchange is not None:
+        return target_exchange.update(**kwargs)
+    else:
+        return NotFoundException(__name__)

migrations/README

@@ -0,0 +1 @@
+Single-database configuration for Flask.

migrations/alembic.ini

@@ -0,0 +1,50 @@
+# A generic, single database configuration.
+
+[alembic]
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic,flask_migrate
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[logger_flask_migrate]
+level = INFO
+handlers =
+qualname = flask_migrate
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

migrations/env.py

@@ -0,0 +1,91 @@
+from __future__ import with_statement
+
+import logging
+from logging.config import fileConfig
+
+from flask import current_app
+
+from alembic import context
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+logger = logging.getLogger('alembic.env')
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+config.set_main_option(
+    'sqlalchemy.url',
+    str(current_app.extensions['migrate'].db.get_engine().url).replace(
+        '%', '%%'))
+target_metadata = current_app.extensions['migrate'].db.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url, target_metadata=target_metadata, literal_binds=True
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+
+    # this callback is used to prevent an auto-migration from being generated
+    # when there are no changes to the schema
+    # reference: http://alembic.zzzcomputing.com/en/latest/cookbook.html
+    def process_revision_directives(context, revision, directives):
+        if getattr(config.cmd_opts, 'autogenerate', False):
+            script = directives[0]
+            if script.upgrade_ops.is_empty():
+                directives[:] = []
+                logger.info('No changes in schema detected.')
+
+    connectable = current_app.extensions['migrate'].db.get_engine()
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            process_revision_directives=process_revision_directives,
+            **current_app.extensions['migrate'].configure_args
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

migrations/script.py.mako

@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

migrations/versions/14ceaaaa6e85_initial_create.py

@@ -0,0 +1,33 @@
+"""initial create
+
+Revision ID: 14ceaaaa6e85
+Revises: 
+Create Date: 2021-09-19 23:52:49.797793
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '14ceaaaa6e85'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('target-exchange',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('name', sa.String(length=255), nullable=False),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('name')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('target-exchange')
+    # ### end Alembic commands ###