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87 lines
2.4 KiB
Python
87 lines
2.4 KiB
Python
import random
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import string
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from functools import cached_property
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__all__ = (
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'FieldSet',
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'InlineFields',
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'ObjectAttribute',
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'TabbedGroups',
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)
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class FieldSet:
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"""
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A generic grouping of fields, with an optional name. Each item will be rendered
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on its own row under the provided heading (name), if any. The following types
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may be passed as items:
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* Field name (string)
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* InlineFields instance
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* TabbedGroups instance
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* ObjectAttribute instance
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Parameters:
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items: An iterable of items to be rendered (one per row)
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name: The fieldset's name, displayed as a heading (optional)
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"""
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def __init__(self, *items, name=None):
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self.items = items
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self.name = name
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class InlineFields:
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"""
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A set of fields rendered inline (side-by-side) with a shared label.
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Parameters:
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fields: An iterable of form field names
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label: The label text to render for the row (optional)
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"""
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def __init__(self, *fields, label=None):
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self.fields = fields
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self.label = label
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class TabbedGroups:
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"""
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Two or more groups of fields (FieldSets) arranged under tabs among which the user can toggle.
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Parameters:
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fieldsets: An iterable of FieldSet instances, one per tab. Each FieldSet *must* have a
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name assigned, which will be employed as the tab's label.
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"""
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def __init__(self, *fieldsets):
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for fs in fieldsets:
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if not fs.name:
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raise ValueError(f"Grouped fieldset {fs} must have a name.")
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self.groups = fieldsets
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# Initialize a random ID for the group (for tab selection)
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self.id = ''.join(
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random.choice(string.ascii_lowercase + string.digits) for _ in range(8)
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)
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@cached_property
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def tabs(self):
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return [
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{
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'id': f'{self.id}_{i}',
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'title': group.name,
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'fields': group.items,
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} for i, group in enumerate(self.groups, start=1)
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]
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class ObjectAttribute:
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"""
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Renders the value for a specific attribute on the form's instance. This may be used to
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display a read-only value and convey additional context to the user. If the attribute has
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a `get_absolute_url()` method, it will be rendered as a hyperlink.
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Parameters:
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name: The name of the attribute to be displayed
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"""
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def __init__(self, name):
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self.name = name
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