some translation stuff

[wolnelektury.git] / apps / modeltranslation / admin.py

diff --git a/apps/modeltranslation/admin.py b/apps/modeltranslation/admin.py
new file mode 100644 (file)
index 0000000..b51e3a3
--- /dev/null
+++ b/apps/modeltranslation/admin.py
@@ -0,0 +1,140 @@
+# -*- coding: utf-8 -*-
+from copy import deepcopy
+
+from django import forms, template
+from django.conf import settings
+from django.contrib import admin
+from django.contrib.contenttypes import generic
+
+from modeltranslation.translator import translator
+from modeltranslation.utils import get_translation_fields
+# Ensure that models are registered for translation before TranslationAdmin
+# runs. The import is supposed to resolve a race condition between model import
+# and translation registration in production (see issue 19).
+import modeltranslation.models
+
+
+class TranslationAdminBase(object):
+    """
+    Mixin class which adds patch_translation_field functionality.
+    """
+    def patch_translation_field(self, db_field, field, **kwargs):
+        trans_opts = translator.get_options_for_model(self.model)
+
+        # Hide the original field by making it non-editable.
+        if db_field.name in trans_opts.fields:
+            db_field.editable = False
+
+        # For every localized field copy the widget from the original field
+        if db_field.name in trans_opts.localized_fieldnames_rev:
+            orig_fieldname = trans_opts.localized_fieldnames_rev[db_field.name]
+            orig_formfield = self.formfield_for_dbfield( \
+                                self.model._meta.get_field(orig_fieldname),
+                                                           **kwargs)
+
+            # In case the original form field was required, make the default
+            # translation field required instead.
+            if db_field.language == settings.LANGUAGES[0][0] and \
+               orig_formfield.required:
+                orig_formfield.required = False
+                orig_formfield.blank = True
+                field.required = True
+                field.blank = False
+
+            field.widget = deepcopy(orig_formfield.widget)
+
+
+class TranslationAdmin(admin.ModelAdmin, TranslationAdminBase):
+    def __init__(self, *args, **kwargs):
+        super(TranslationAdmin, self).__init__(*args, **kwargs)
+
+        trans_opts = translator.get_options_for_model(self.model)
+
+        # Replace original field with translation field for each language
+        if self.fields:
+            fields_new = list(self.fields)
+            for field in self.fields:
+                if field in trans_opts.fields:
+                    index = fields_new.index(field)
+                    translation_fields = get_translation_fields(field)
+                    fields_new[index:index + 1] = translation_fields
+            self.fields = fields_new
+
+        if self.fieldsets:
+            fieldsets_new = list(self.fieldsets)
+            for (name, dct) in self.fieldsets:
+                if 'fields' in dct:
+                    fields_new = list(dct['fields'])
+                    for field in dct['fields']:
+                        if field in trans_opts.fields:
+                            index = fields_new.index(field)
+                            translation_fields = get_translation_fields(field)
+                            fields_new[index:index + 1] = translation_fields
+                    dct['fields'] = fields_new
+            self.fieldsets = fieldsets_new
+
+        if self.list_editable:
+            editable_new = list(self.list_editable)
+            display_new = list(self.list_display)
+            for field in self.list_editable:
+                if field in trans_opts.fields:
+                    index = editable_new.index(field)
+                    display_index = display_new.index(field)
+                    translation_fields = get_translation_fields(field)
+                    editable_new[index:index + 1] = translation_fields
+                    display_new[display_index:display_index + 1] = \
+                        translation_fields
+            self.list_editable = editable_new
+            self.list_display = display_new
+
+        if self.prepopulated_fields:
+            prepopulated_fields_new = dict(self.prepopulated_fields)
+            for (k, v) in self.prepopulated_fields.items():
+                translation_fields = get_translation_fields(v[0])
+                prepopulated_fields_new[k] = tuple([translation_fields[0]])
+            self.prepopulated_fields = prepopulated_fields_new
+
+    def formfield_for_dbfield(self, db_field, **kwargs):
+        # Call the baseclass function to get the formfield
+        field = super(TranslationAdmin, self).formfield_for_dbfield(db_field,
+                                                                    **kwargs)
+        self.patch_translation_field(db_field, field, **kwargs)
+        return field
+
+
+class TranslationTabularInline(admin.TabularInline, TranslationAdminBase):
+    def formfield_for_dbfield(self, db_field, **kwargs):
+        # Call the baseclass function to get the formfield
+        field = super(TranslationTabularInline,
+                      self).formfield_for_dbfield(db_field, **kwargs)
+        self.patch_translation_field(db_field, field, **kwargs)
+        return field
+
+
+class TranslationStackedInline(admin.StackedInline, TranslationAdminBase):
+    def formfield_for_dbfield(self, db_field, **kwargs):
+        # Call the baseclass function to get the formfield
+        field = super(TranslationStackedInline,
+                      self).formfield_for_dbfield(db_field, **kwargs)
+        self.patch_translation_field(db_field, field, **kwargs)
+        return field
+
+
+class TranslationGenericTabularInline(generic.GenericTabularInline,
+                                      TranslationAdminBase):
+    def formfield_for_dbfield(self, db_field, **kwargs):
+        # Call the baseclass function to get the formfield
+        field = super(TranslationGenericTabularInline,
+                      self).formfield_for_dbfield(db_field, **kwargs)
+        self.patch_translation_field(db_field, field, **kwargs)
+        return field
+
+
+class TranslationGenericStackedInline(generic.GenericStackedInline,
+                                      TranslationAdminBase):
+    def formfield_for_dbfield(self, db_field, **kwargs):
+        # Call the baseclass function to get the formfield
+        field = super(TranslationGenericStackedInline,
+                      self).formfield_for_dbfield(db_field, **kwargs)
+        self.patch_translation_field(db_field, field, **kwargs)
+        return field