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| author | Michael Merickel <michael@merickel.org> | 2015-10-21 16:57:52 -0500 |
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| committer | Michael Merickel <michael@merickel.org> | 2015-10-21 16:57:52 -0500 |
| commit | adb9377a963d7fdc7b7bf616740fb5dd2e40b2bf (patch) | |
| tree | 1038d03a21148607c79f740f0b32b147929251bf /docs/tutorials/wiki2/definingmodels.rst | |
| parent | 452fdbef94bb29560497ec8a9ccbc3b9c2ecd2dd (diff) | |
| parent | d4221720b8409eafb65b301562be327af0196c7e (diff) | |
| download | pyramid-adb9377a963d7fdc7b7bf616740fb5dd2e40b2bf.tar.gz pyramid-adb9377a963d7fdc7b7bf616740fb5dd2e40b2bf.tar.bz2 pyramid-adb9377a963d7fdc7b7bf616740fb5dd2e40b2bf.zip | |
Merge branch 'master' into feature/alchemy-scaffold-update
Diffstat (limited to 'docs/tutorials/wiki2/definingmodels.rst')
| -rw-r--r-- | docs/tutorials/wiki2/definingmodels.rst | 115 |
1 files changed, 58 insertions, 57 deletions
diff --git a/docs/tutorials/wiki2/definingmodels.rst b/docs/tutorials/wiki2/definingmodels.rst index e30af12b2..b2d9bf83a 100644 --- a/docs/tutorials/wiki2/definingmodels.rst +++ b/docs/tutorials/wiki2/definingmodels.rst @@ -7,26 +7,27 @@ be to define a :term:`domain model` constructor representing a wiki page. We'll do this inside our ``models.py`` file. -Making Edits to ``models.py`` ------------------------------ +Edit ``models.py`` +------------------ .. note:: There is nothing special about the filename ``models.py``. A - project may have many models throughout its codebase in arbitrarily-named + project may have many models throughout its codebase in arbitrarily named files. Files implementing models often have ``model`` in their filenames - (or they may live in a Python subpackage of your application package named - ``models``) , but this is only by convention. + or they may live in a Python subpackage of your application package named + ``models``, but this is only by convention. -Open ``tutorial/tutorial/models.py`` file and edit it to look like the +Open ``tutorial/tutorial/models.py`` file and edit it to look like the following: .. literalinclude:: src/models/tutorial/models.py :linenos: :language: py - :emphasize-lines: 20-22,25 + :emphasize-lines: 20-22,24,25 -(The highlighted lines are the ones that need to be changed.) +The highlighted lines are the ones that need to be changed, as well as +removing lines that reference ``Index``. The first thing we've done is remove the stock ``MyModel`` class from the generated ``models.py`` file. The ``MyModel`` class is only a @@ -44,74 +45,74 @@ this class inherits from an instance of As you can see, our ``Page`` class has a class level attribute ``__tablename__`` which equals the string ``'pages'``. This means that SQLAlchemy will store our wiki data in a SQL table named ``pages``. Our -``Page`` class will also have class-level attributes named ``id``, ``name`` and -``data`` (all instances of :class:`sqlalchemy.schema.Column`). -These will map to columns in the ``pages`` table. -The ``id`` attribute will be the primary key in the table. -The ``name`` attribute will be a text attribute, each value of -which needs to be unique within the column. The ``data`` attribute is a text -attribute that will hold the body of each page. +``Page`` class will also have class-level attributes named ``id``, ``name`` +and ``data`` (all instances of :class:`sqlalchemy.schema.Column`). These will +map to columns in the ``pages`` table. The ``id`` attribute will be the +primary key in the table. The ``name`` attribute will be a text attribute, +each value of which needs to be unique within the column. The ``data`` +attribute is a text attribute that will hold the body of each page. Changing ``scripts/initializedb.py`` ------------------------------------ We haven't looked at the details of this file yet, but within the ``scripts`` -directory of your ``tutorial`` package is a file named ``initializedb.py``. Code -in this file is executed whenever we run the ``initialize_tutorial_db`` command -(as we did in the installation step of this tutorial). +directory of your ``tutorial`` package is a file named ``initializedb.py``. +Code in this file is executed whenever we run the ``initialize_tutorial_db`` +command, as we did in the installation step of this tutorial. -Since we've changed our model, we need to make changes to our ``initializedb.py`` -script. In particular, we'll replace our import of ``MyModel`` with one of -``Page`` and we'll change the very end of the script to create a ``Page`` -rather than a ``MyModel`` and add it to our ``DBSession``. +Since we've changed our model, we need to make changes to our +``initializedb.py`` script. In particular, we'll replace our import of +``MyModel`` with one of ``Page`` and we'll change the very end of the script +to create a ``Page`` rather than a ``MyModel`` and add it to our +``DBSession``. -Open ``tutorial/tutorial/scripts/initializedb.py`` and edit it to look like the -following: +Open ``tutorial/tutorial/scripts/initializedb.py`` and edit it to look like +the following: .. literalinclude:: src/models/tutorial/scripts/initializedb.py :linenos: :language: python - :emphasize-lines: 14,36 + :emphasize-lines: 14,31,36 -(Only the highlighted lines need to be changed.) +Only the highlighted lines need to be changed, as well as removing the lines +referencing ``pyramid.scripts.common`` and ``options`` under the ``main`` +function. -Installing the Project and re-initializing the Database +Installing the project and re-initializing the database ------------------------------------------------------- Because our model has changed, in order to reinitialize the database, we need -to rerun the ``initialize_tutorial_db`` command to pick up the changes you've made -to both the models.py file and to the initializedb.py file. -See :ref:`initialize_db_wiki2` for instructions. +to rerun the ``initialize_tutorial_db`` command to pick up the changes you've +made to both the models.py file and to the initializedb.py file. See +:ref:`initialize_db_wiki2` for instructions. Success will look something like this:: - 2011-11-27 01:22:45,277 INFO [sqlalchemy.engine.base.Engine][MainThread] - PRAGMA table_info("pages") - 2011-11-27 01:22:45,277 INFO [sqlalchemy.engine.base.Engine][MainThread] () - 2011-11-27 01:22:45,277 INFO [sqlalchemy.engine.base.Engine][MainThread] - CREATE TABLE pages ( - id INTEGER NOT NULL, - name TEXT, - data TEXT, - PRIMARY KEY (id), - UNIQUE (name) - ) - - - 2011-11-27 01:22:45,278 INFO [sqlalchemy.engine.base.Engine][MainThread] () - 2011-11-27 01:22:45,397 INFO [sqlalchemy.engine.base.Engine][MainThread] - COMMIT - 2011-11-27 01:22:45,400 INFO [sqlalchemy.engine.base.Engine][MainThread] - BEGIN (implicit) - 2011-11-27 01:22:45,401 INFO [sqlalchemy.engine.base.Engine][MainThread] - INSERT INTO pages (name, data) VALUES (?, ?) - 2011-11-27 01:22:45,401 INFO [sqlalchemy.engine.base.Engine][MainThread] - ('FrontPage', 'This is the front page') - 2011-11-27 01:22:45,402 INFO [sqlalchemy.engine.base.Engine][MainThread] - COMMIT - -Viewing the Application in a Browser ------------------------------------- + 2015-05-24 15:34:14,542 INFO [sqlalchemy.engine.base.Engine:1192][MainThread] SELECT CAST('test plain returns' AS VARCHAR(60)) AS anon_1 + 2015-05-24 15:34:14,542 INFO [sqlalchemy.engine.base.Engine:1193][MainThread] () + 2015-05-24 15:34:14,543 INFO [sqlalchemy.engine.base.Engine:1192][MainThread] SELECT CAST('test unicode returns' AS VARCHAR(60)) AS anon_1 + 2015-05-24 15:34:14,543 INFO [sqlalchemy.engine.base.Engine:1193][MainThread] () + 2015-05-24 15:34:14,543 INFO [sqlalchemy.engine.base.Engine:1097][MainThread] PRAGMA table_info("pages") + 2015-05-24 15:34:14,544 INFO [sqlalchemy.engine.base.Engine:1100][MainThread] () + 2015-05-24 15:34:14,544 INFO [sqlalchemy.engine.base.Engine:1097][MainThread] + CREATE TABLE pages ( + id INTEGER NOT NULL, + name TEXT, + data TEXT, + PRIMARY KEY (id), + UNIQUE (name) + ) + + + 2015-05-24 15:34:14,545 INFO [sqlalchemy.engine.base.Engine:1100][MainThread] () + 2015-05-24 15:34:14,546 INFO [sqlalchemy.engine.base.Engine:686][MainThread] COMMIT + 2015-05-24 15:34:14,548 INFO [sqlalchemy.engine.base.Engine:646][MainThread] BEGIN (implicit) + 2015-05-24 15:34:14,549 INFO [sqlalchemy.engine.base.Engine:1097][MainThread] INSERT INTO pages (name, data) VALUES (?, ?) + 2015-05-24 15:34:14,549 INFO [sqlalchemy.engine.base.Engine:1100][MainThread] ('FrontPage', 'This is the front page') + 2015-05-24 15:34:14,550 INFO [sqlalchemy.engine.base.Engine:686][MainThread] COMMIT + +View the application in a browser +--------------------------------- We can't. At this point, our system is in a "non-runnable" state; we'll need to change view-related files in the next chapter to be able to start the |
