🐛 fix(Alembic): Remove compare_type references

It's no longer required and indeed gives an error. Removed `compare_type` from lecture body and also from section 12 code.

Author: jslvtr

docs/docs/11_deploy_to_render/05_environment_variables_and_migrations/README.md

@@ -193,114 +193,7 @@ class UserModel(db.Model):
 
 ### Running our migration with string length changes
 
-Now we want to create a new migration so that our changes to the `UserModel` will be applied. But because we're changing the length of a string column, we need to first make a modification to the Alembic configuration.
-
-The changes we want to make are to add `compare_type=True`[^alembic_docs] in both `context.configure()` calls:
-
-```python title="migrations/env.py"
-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,
-        # highlight-start
-        compare_type=True,
-        # highlight-end
-        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,
-            # highlight-start
-            compare_type=True,
-            # highlight-end
-            **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()
-
-```
-
-Next, let's create the new migration:
+Now we want to create a new migration so that our changes to the `UserModel` will be applied:
 
 ```bash
 flask db migrate

docs/docs/12_task_queues_emails/01_send_emails_python_mailgun/end/app.py

@@ -9,7 +9,6 @@
 
 from db import db
 from blocklist import BLOCKLIST
-import models
 
 from resources.item import blp as ItemBlueprint
 from resources.store import blp as StoreBlueprint
@@ -97,10 +96,6 @@ def missing_token_callback(error):
             401,
         )
 
-    @app.before_first_request
-    def create_tables():
-        db.create_all()
-
     api.register_blueprint(ItemBlueprint)
     api.register_blueprint(StoreBlueprint)
     api.register_blueprint(TagBlueprint)

docs/docs/12_task_queues_emails/01_send_emails_python_mailgun/end/migrations/env.py

@@ -48,7 +48,6 @@ def run_migrations_offline():
     context.configure(
         url=url,
         target_metadata=target_metadata,
-        compare_type=True,
         literal_binds=True
     )
 
@@ -81,8 +80,7 @@ def process_revision_directives(context, revision, directives):
             connection=connection,
             target_metadata=target_metadata,
             process_revision_directives=process_revision_directives,
-            compare_type=True,
-            **current_app.extensions['migrate'].configure_args
+                **current_app.extensions['migrate'].configure_args
         )
 
         with context.begin_transaction():

docs/docs/12_task_queues_emails/01_send_emails_python_mailgun/start/app.py

@@ -9,7 +9,6 @@
 
 from db import db
 from blocklist import BLOCKLIST
-import models
 
 from resources.item import blp as ItemBlueprint
 from resources.store import blp as StoreBlueprint
@@ -97,10 +96,6 @@ def missing_token_callback(error):
             401,
         )
 
-    @app.before_first_request
-    def create_tables():
-        db.create_all()
-
     api.register_blueprint(ItemBlueprint)
     api.register_blueprint(StoreBlueprint)
     api.register_blueprint(TagBlueprint)

docs/docs/12_task_queues_emails/01_send_emails_python_mailgun/start/migrations/env.py

@@ -48,7 +48,6 @@ def run_migrations_offline():
     context.configure(
         url=url,
         target_metadata=target_metadata,
-        compare_type=True,
         literal_binds=True
     )
 
@@ -81,8 +80,7 @@ def process_revision_directives(context, revision, directives):
             connection=connection,
             target_metadata=target_metadata,
             process_revision_directives=process_revision_directives,
-            compare_type=True,
-            **current_app.extensions['migrate'].configure_args
+                **current_app.extensions['migrate'].configure_args
         )
 
         with context.begin_transaction():

docs/docs/12_task_queues_emails/02_send_email_user_registration/end/app.py

@@ -9,7 +9,6 @@
 
 from db import db
 from blocklist import BLOCKLIST
-import models
 
 from resources.item import blp as ItemBlueprint
 from resources.store import blp as StoreBlueprint
@@ -97,10 +96,6 @@ def missing_token_callback(error):
             401,
         )
 
-    @app.before_first_request
-    def create_tables():
-        db.create_all()
-
     api.register_blueprint(ItemBlueprint)
     api.register_blueprint(StoreBlueprint)
     api.register_blueprint(TagBlueprint)

docs/docs/12_task_queues_emails/02_send_email_user_registration/end/migrations/env.py

@@ -48,7 +48,6 @@ def run_migrations_offline():
     context.configure(
         url=url,
         target_metadata=target_metadata,
-        compare_type=True,
         literal_binds=True
     )
 
@@ -81,8 +80,7 @@ def process_revision_directives(context, revision, directives):
             connection=connection,
             target_metadata=target_metadata,
             process_revision_directives=process_revision_directives,
-            compare_type=True,
-            **current_app.extensions['migrate'].configure_args
+                **current_app.extensions['migrate'].configure_args
         )
 
         with context.begin_transaction():

docs/docs/12_task_queues_emails/02_send_email_user_registration/start/app.py

@@ -9,7 +9,6 @@
 
 from db import db
 from blocklist import BLOCKLIST
-import models
 
 from resources.item import blp as ItemBlueprint
 from resources.store import blp as StoreBlueprint
@@ -97,10 +96,6 @@ def missing_token_callback(error):
             401,
         )
 
-    @app.before_first_request
-    def create_tables():
-        db.create_all()
-
     api.register_blueprint(ItemBlueprint)
     api.register_blueprint(StoreBlueprint)
     api.register_blueprint(TagBlueprint)

docs/docs/12_task_queues_emails/02_send_email_user_registration/start/migrations/env.py

@@ -48,7 +48,6 @@ def run_migrations_offline():
     context.configure(
         url=url,
         target_metadata=target_metadata,
-        compare_type=True,
         literal_binds=True
     )
 
@@ -81,8 +80,7 @@ def process_revision_directives(context, revision, directives):
             connection=connection,
             target_metadata=target_metadata,
             process_revision_directives=process_revision_directives,
-            compare_type=True,
-            **current_app.extensions['migrate'].configure_args
+                **current_app.extensions['migrate'].configure_args
         )
 
         with context.begin_transaction():

docs/docs/12_task_queues_emails/04_populate_rq_task_queue/end/app.py

@@ -9,7 +9,6 @@
 
 from db import db
 from blocklist import BLOCKLIST
-import models
 
 from resources.item import blp as ItemBlueprint
 from resources.store import blp as StoreBlueprint
@@ -97,10 +96,6 @@ def missing_token_callback(error):
             401,
         )
 
-    @app.before_first_request
-    def create_tables():
-        db.create_all()
-
     api.register_blueprint(ItemBlueprint)
     api.register_blueprint(StoreBlueprint)
     api.register_blueprint(TagBlueprint)