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EEA Metadata models replication support

Project Description
Flis Metadata Client

Client for FLIS applications that require common metadata

Quick start

#. Add ``flis_metadata.common`` and ``flis_metadata.client``
to your ``INSTALLED_APPS`` setting like this::


#. Add ``METADATA_REMOTE_HOST`` and ``METADATA_REMOTE_PATH`` into your settings file::

METADATA_REMOTE_HOST = 'http://localhost:8000'

#. Run ``python migrate`` to migrate the common app.

#. Run ``python sync_remote_models`` to sync the metadata models with
the remote ones.

How to add a new model
We want to move model ``Foo`` from ``flis.someapp`` to be
replicated in all FLIS apps

In this app:
1. Add the model in ``common/``. Make sure it extends

2. Add ``urls``, ``views`` and ``templates`` to edit it.

3. Add a fixture having all instances of ``Foo`` for every FLIS app.
This data will be replicated and migrated in every app that uses
this package, so make sure that the migration includes everything

4. Update the pip package using ````.

In ``flis.someapp`` and other apps using this model
#. Update ``eaa.flis.metadata`` package in ``requirements.txt`` and
install it.

#. For every relation to the ``Foo`` model::

# add a new fake foreign key field
x = models.ForeingKey(Foo)
fake_x = models.ForeingKey('common.Foo')

# or add a new fake many to many field
y = models.ManyToManyField(Foo)
fake_y = models.ManyToManyField('common.Foo')

#. Add a migration to add the new fields

#. Create a datamigration that

a) Calls ``load_metadata_fixtures`` management command
b) For every ``x`` copies the same information in ``fake_x``
using the instance found in ``common.Foo``::

obj.fake_x = orm['common.Foo'].objects.get(title=obj.x.title)

# or

for y in obj.y.all():

#. Remove the ``Foo`` model and ``x`` fields from

#. Create an automatic schemamigration to reflect the removals.

#. Rename ``fake_x`` fields to ``x`` in ````.

#. In the migration generated at step 5 rename the fields and M2M tables from
``fake_x`` to ``x``.

#. Run the migration in different corner cases.
You can browse through ``flis.flip``, ``flis.horizon-scanning-tool`` or
``flis.live_catalogue`` to see an example of such migrations.
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Release History

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
eea.flis.metadata-0.6.2.tar.gz (8.0 kB) Copy SHA256 Checksum SHA256 Source Oct 13, 2016

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