32c52c7b31
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2079 fd906abe-77d9-0310-91a1-e0d9ade77398
92 lines
2.8 KiB
Text
92 lines
2.8 KiB
Text
===========================
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Schema and Field Management
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===========================
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($Id$)
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>>> from cybertools.composer.schema import Schema
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>>> from cybertools.composer.schema import Field
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Working with predefined schemas
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===============================
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We start with setting up a schema with fields.
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>>> serviceSchema = Schema(
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... Field(u'title', renderFactory=None),
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... Field(u'description'),
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... Field(u'start'),
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... Field(u'end'),
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... Field(u'capacity'),
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... )
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For using a schema we need some class that we can use for creating
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objects.
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>>> class Service(object):
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... pass
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The schema will be connected with an object via an instance adapter.
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In addition, we need a field instance adapter that cares for the
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correct conversion of input data to context attributes.
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>>> from cybertools.composer.schema.instance import Editor
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>>> from cybertools.composer.schema.field import FieldInstance
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>>> from zope import component
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>>> component.provideAdapter(Editor, (Service,), name="service.edit")
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>>> component.provideAdapter(FieldInstance)
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>>> srv = Service()
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>>> inst = component.getAdapter(srv, name='service.edit')
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>>> inst.template = serviceSchema
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>>> inst.applyTemplate(data=dict(title='Service', capacity='30'))
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<...FormState object ...>
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>>> srv.title, srv.description, srv.capacity
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(u'Service', u'', u'30')
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Creating a schema from an interface
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===================================
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>>> from zope.interface import Interface, implements
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>>> import zope.schema
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>>> from cybertools.composer.schema.factory import SchemaFactory
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>>> component.provideAdapter(SchemaFactory)
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>>> class IPerson(Interface):
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... firstName = zope.schema.TextLine(title=u'First name')
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... lastName = zope.schema.TextLine(title=u'Last name')
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... age = zope.schema.Int(title=u'Age')
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>>> class Person(object):
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... implements(IPerson)
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>>> from cybertools.composer.schema.interfaces import ISchemaFactory
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>>> factory = ISchemaFactory(Person())
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>>> schema = factory(IPerson)
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>>> for f in schema.fields:
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... print f.name, f.title, f.fieldType
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firstName First name textline
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lastName Last name textline
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age Age number
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Using a more specialized schema factory
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---------------------------------------
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>>> class PersonSchemaFactory(SchemaFactory):
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... def __call__(self, manager=None):
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... schema = super(PersonSchemaFactory, self).__call__(manager)
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... del schema.fields['firstName'] # don't show first name
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... return schema
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>>> component.provideAdapter(PersonSchemaFactory, (IPerson,))
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>>> factory = ISchemaFactory(Person())
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>>> schema = factory(IPerson)
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>>> for f in schema.fields:
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... print f.name, f.title, f.fieldType
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lastName Last name textline
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age Age number
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