|
|
|
@ -15,7 +15,7 @@ applications.
|
|
|
|
|
Basic Usage |
|
|
|
|
----------- |
|
|
|
|
|
|
|
|
|
After installation of Flask you will now find a ``flask`` script installed |
|
|
|
|
After installation of Flask you will now find a :command:`flask` script installed |
|
|
|
|
into your virtualenv. If you don't want to install Flask or you have a |
|
|
|
|
special use-case you can also use ``python -m flask`` to accomplish exactly |
|
|
|
|
the same. |
|
|
|
@ -25,9 +25,9 @@ your Flask application's :attr:`Flask.cli` instance as well as some
|
|
|
|
|
built-in commands that are always there. Flask extensions can also |
|
|
|
|
register more commands there if they desire so. |
|
|
|
|
|
|
|
|
|
For the ``flask`` script to work, an application needs to be discovered. |
|
|
|
|
For the :command:`flask` script to work, an application needs to be discovered. |
|
|
|
|
The two most common ways are either an environment variable |
|
|
|
|
(``FLASK_APP``) or the ``--app`` / ``-a`` parameter. It should be the |
|
|
|
|
(``FLASK_APP``) or the :option:`--app` / :option:`-a` parameter. It should be the |
|
|
|
|
import path for your application or the path to a Python file. In the |
|
|
|
|
latter case Flask will attempt to setup the Python path for you |
|
|
|
|
automatically and discover the module name but that might not always work. |
|
|
|
@ -62,7 +62,7 @@ automatically also activate the correct application name.
|
|
|
|
|
Debug Flag |
|
|
|
|
---------- |
|
|
|
|
|
|
|
|
|
The ``flask`` script can be run with ``--debug`` or ``--no-debug`` to |
|
|
|
|
The :command:`flask` script can be run with :option:`--debug` or :option:`--no-debug` to |
|
|
|
|
automatically flip the debug flag of the application. This can also be |
|
|
|
|
configured by setting ``FLASK_DEBUG`` to ``1`` or ``0``. |
|
|
|
|
|
|
|
|
@ -122,7 +122,7 @@ Factory Functions
|
|
|
|
|
----------------- |
|
|
|
|
|
|
|
|
|
In case you are using factory functions to create your application (see |
|
|
|
|
:ref:`app-factories`) you will discover that the ``flask`` command cannot |
|
|
|
|
:ref:`app-factories`) you will discover that the :command:`flask` command cannot |
|
|
|
|
work with them directly. Flask won't be able to figure out how to |
|
|
|
|
instantiate your application properly by itself. Because of this reason |
|
|
|
|
the recommendation is to create a separate file that instantiates |
|
|
|
@ -145,14 +145,14 @@ it up::
|
|
|
|
|
export YOURAPPLICATION_CONFIG=/path/to/config.cfg |
|
|
|
|
export FLASK_APP=/path/to/autoapp.py |
|
|
|
|
|
|
|
|
|
From this point onwards ``flask`` will find your application. |
|
|
|
|
From this point onwards :command:`flask` will find your application. |
|
|
|
|
|
|
|
|
|
.. _custom-scripts: |
|
|
|
|
|
|
|
|
|
Custom Scripts |
|
|
|
|
-------------- |
|
|
|
|
|
|
|
|
|
While the most common way is to use the ``flask`` command, you can also |
|
|
|
|
While the most common way is to use the :command:`flask` command, you can also |
|
|
|
|
make your own "driver scripts". Since Flask uses click for the scripts |
|
|
|
|
there is no reason you cannot hook these scripts into any click |
|
|
|
|
application. There is one big caveat and that is, that commands |
|
|
|
@ -162,7 +162,7 @@ necessary so that the commands know which Flask application they have to
|
|
|
|
|
work with. |
|
|
|
|
|
|
|
|
|
To understand why you might want custom scripts you need to understand how |
|
|
|
|
click finds and executes the Flask application. If you use the ``flask`` |
|
|
|
|
click finds and executes the Flask application. If you use the :command:`flask` |
|
|
|
|
script you specify the application to work with on the command line or |
|
|
|
|
environment variable as an import name. This is simple but it has some |
|
|
|
|
limitations. Primarily it does not work with application factory |
|
|
|
@ -223,7 +223,7 @@ step.
|
|
|
|
|
call that function with the script info and ask for it to be created. |
|
|
|
|
4. In step 2 you could see that the config is passed to the actual |
|
|
|
|
creation function. This config comes from the :func:`script_info_option` |
|
|
|
|
decorator for the main script. It accepts a ``--config`` option and |
|
|
|
|
decorator for the main script. It accepts a :option:`--config` option and |
|
|
|
|
then stores it in the script info so we can use it to create the |
|
|
|
|
application. |
|
|
|
|
5. All is rounded up by invoking the script. |
|
|
|
@ -239,7 +239,7 @@ both provide custom commands to click as well as not loading your
|
|
|
|
|
application unless it has to. The reason for this is added flexibility. |
|
|
|
|
|
|
|
|
|
This way an application can provide custom commands, but even in the |
|
|
|
|
absence of an application the ``flask`` script is still operational on a |
|
|
|
|
absence of an application the :command:`flask` script is still operational on a |
|
|
|
|
basic level. In addition to that it means that the individual commands |
|
|
|
|
have the option to avoid creating an instance of the Flask application |
|
|
|
|
unless required. This is very useful as it allows the server commands for |
|
|
|
|