def clean(self):
"""
Detects when the instance is newer than the one used to generate the
form. Calls merge() when there is a version conflict, and if there is
still anerror, updates the version date in the form to give the user a
chance to save anyway.
Returns
cleaned_data.
Raises:
ValidationError: When there's a conflict when calling merge().
"""
current_version_date = str(self.get_version_date(self.instance))
form_version_date = self.data['version_date']
if current_version_date != form_version_date:
ancestor = None
if is_versioned(self.instance) and form_version_date:
ancestor_model = self.instance.history.as_of(form_version_date)
ancestor = model_to_dict(ancestor_model)
try:
self.cleaned_data = self.merge(self.cleaned_data, self.initial,
ancestor)
except forms.ValidationError as e:
self.data = self.data.copy()
self.data['version_date'] = current_version_date
raise e
return self.cleaned_data
def get_version_date(self, instance):
"""
Gets the datetime the instance was last modified. This default
implementation either uses the field specified by version_date_field
or grabs a DateTimeField with auto_now=True.
Override this method to customize how you want to determine the
version date.
"""
if hasattr(self, 'version_date_field'):
return getattr(instance, self.version_date_field)
# if using versioning, return most recent version date
if is_versioned(instance):
try:
return instance.history.most_recent().history_info.date
except:
return ''
# no version_date_field specified, let's try to guess it
date_fields = [
field for field in instance._meta.fields
if isinstance(field, models.DateTimeField) and field.auto_now
]
if date_fields:
return getattr(instance, date_fields[0].name) or ''
raise ValueError('MergeModelForm does not have a version_date_field')
def clean(self):
"""
Detects when the instance is newer than the one used to generate the
form. Calls merge() when there is a version conflict, and if there is
still an error, updates the version date in the form to give the user
a chance to save anyway.
Returns
cleaned_data.
Raises:
ValidationError: When there's a conflict when calling merge().
"""
self.cleaned_data = super(self.__class__.__base__, self).clean()
current_version_date = str(self.get_version_date(self.instance))
form_version_date = self.data['version_date']
if current_version_date != form_version_date:
ancestor = None
if is_versioned(self.instance) and form_version_date:
ancestor_model = get_versions(self.instance).as_of(
form_version_date)
ancestor = model_to_dict(ancestor_model)
try:
self.cleaned_data = self.merge(self.cleaned_data, self.initial,
ancestor)
except forms.ValidationError as e:
self.data = self.data.copy()
self.data['version_date'] = current_version_date
raise e
else:
# Note that we performed a merge, for use elsewhere.
self.performed_merge = True
return self.cleaned_data
def get_version_date(self, instance):
"""
Gets the datetime the instance was last modified. This default
implementation either uses the field specified by version_date_field
or grabs a DateTimeField with auto_now=True.
Override this method to customize how you want to determine the
version date.
"""
if hasattr(self, 'version_date_field'):
return getattr(instance, self.version_date_field)
# if using versioning, return most recent version date
if is_versioned(instance):
try:
return get_versions(instance).most_recent().version_info.date
except:
return ''
# no version_date_field specified, let's try to guess it
date_fields = [field for field in instance._meta.fields
if isinstance(field, models.DateTimeField) and
field.auto_now]
if date_fields:
return getattr(instance, date_fields[0].name) or ''
raise ValueError('MergeMixin cannot find a version_date_field')
def clean(self):
"""
Detects when the instance is newer than the one used to generate the
form. Calls merge() when there is a version conflict, and if there is
still anerror, updates the version date in the form to give the user a
chance to save anyway.
Returns
cleaned_data.
Raises:
ValidationError: When there's a conflict when calling merge().
"""
current_version_date = str(self.get_version_date(self.instance))
form_version_date = self.data["version_date"]
if current_version_date != form_version_date:
ancestor = None
if is_versioned(self.instance) and form_version_date:
ancestor_model = self.instance.history.as_of(form_version_date)
ancestor = model_to_dict(ancestor_model)
try:
self.cleaned_data = self.merge(self.cleaned_data, self.initial, ancestor)
except forms.ValidationError as e:
self.data = self.data.copy()
self.data["version_date"] = current_version_date
raise e
return self.cleaned_data
def get_context_data(self, **kwargs):
context = super(AddContributorsMixin, self).get_context_data(**kwargs)
obj = self.get_object()
if not is_versioned(obj):
return context
users_by_edit_count = obj.versions.exclude(
history_user__isnull=True).order_by('history_user').values(
'history_user').annotate(
nedits=Count('history_user')).order_by('-nedits')
top_3 = users_by_edit_count[:3]
num_rest = len(users_by_edit_count[3:])
top_3_html = ''
for u_info in top_3:
user = User.objects.get(pk=u_info['history_user'])
top_3_html += user_link(user,
region=self.get_region(),
show_username=False,
size=24)
context['contributors_html'] = top_3_html
context['contributors_number'] = num_rest
return context
def tearDown(self):
"""
Remove all created models and all model history.
"""
for M in self.test_models:
for m in M.objects.all():
if is_versioned(M):
m.delete(track_changes=False)
else:
m.delete()
self._cleanup_file_environment()
def tearDown(self):
"""
Remove all created models and all model history.
"""
for M in self.test_models:
for m in M.objects.all():
if is_versioned(M):
m.delete(track_changes=False)
else:
m.delete()
self._cleanup_file_environment()
def update_region_for_instance(m, region):
if not hasattr(m, 'region'):
# Doesn't have an explicit region attribute, so skip.
return
if is_versioned(m):
for m_h in m.versions.all():
m_h.region = region
m_h.save()
m.region = region
m.save(track_changes=False)
else:
m.save()
def update_region_for_instance(m, region):
if not hasattr(m, 'region'):
# Doesn't have an explicit region attribute, so skip.
return
if is_versioned(m):
for m_h in m.versions.all():
m_h.region = region
m_h.save()
m.region = region
m.save(track_changes=False)
else:
m.save()
def get_context_data(self, **kwargs):
context = super(AddContributorsMixin, self).get_context_data(**kwargs)
obj = self.get_object()
if not is_versioned(obj):
return context
users_by_edit_count = obj.versions.exclude(history_user__isnull=True).order_by('history_user').values('history_user').annotate(nedits=Count('history_user')).order_by('-nedits')
top_3 = users_by_edit_count[:3]
num_rest = len(users_by_edit_count[3:])
top_3_html = ''
for u_info in top_3:
user = User.objects.get(pk=u_info['history_user'])
top_3_html += user_link(user, region=self.get_region(), show_username=False, size=24)
context['contributors_html'] = top_3_html
context['contributors_number'] = num_rest
return context
def rename_to(self, pagename):
"""
Renames the page to `pagename`. Moves related objects around
accordingly.
"""
def _get_slug_lookup(unique_together, obj, new_p):
d = {}
for field in unique_together:
d[field] = getattr(obj, field)
d['slug'] = new_p.slug
return d
def _already_exists(obj):
M = obj.__class__
unique_vals = unique_lookup_values_for(obj)
if not unique_vals:
return False
return M.objects.filter(**unique_vals).exists()
from redirects.models import Redirect
from redirects.exceptions import RedirectToSelf
if Page(slug=slugify(pagename), region=self.region).exists():
if slugify(pagename) == self.slug:
# The slug is the same but we're changing the name.
old_name = self.name
self.name = pagename
self.save(comment=_('Renamed from "%s"') % old_name)
return
else:
raise exceptions.PageExistsError(
_("The page '%s' already exists!") % pagename)
# Copy the current page into the new page, zeroing out the
# primary key and setting a new name and slug.
new_p = copy(self)
new_p.pk = None
new_p.name = pagename
new_p.slug = slugify(pagename)
new_p._in_rename = True
new_p.save(comment=_('Renamed from "%s"') % self.name)
# Get all related objects before the original page is deleted.
related_objs = self._get_related_objs()
# Cache all ManyToMany values on related objects so we can restore them
# later--otherwise they will be lost when page is deleted.
for attname, rel_obj_list in related_objs:
if not isinstance(rel_obj_list, list):
rel_obj_list = [rel_obj_list]
for rel_obj in rel_obj_list:
rel_obj._m2m_values = dict(
(f.attname, list(getattr(rel_obj, f.attname).all()))
for f in rel_obj._meta.many_to_many)
# Create a redirect from the starting pagename to the new pagename.
redirect = Redirect(source=self.slug, destination=new_p, region=self.region)
# Creating the redirect causes the starting page to be deleted.
redirect.save()
# Point each related object to the new page and save the object with a
# 'was renamed' comment.
for attname, rel_obj in related_objs:
if isinstance(rel_obj, list):
for obj in rel_obj:
obj.pk = None # Reset the primary key before saving.
try:
getattr(new_p, attname).add(obj)
if _already_exists(obj):
continue
if is_versioned(obj):
obj.save(comment=_("Parent page renamed"))
else:
obj.save()
# Restore any m2m fields now that we have a new pk
for name, value in obj._m2m_values.items():
setattr(obj, name, value)
except RedirectToSelf, s:
# We don't want to create a redirect to ourself.
# This happens during a rename -> rename-back
# cycle.
continue
else:
# This is an easy way to set obj to point to new_p.
setattr(new_p, attname, rel_obj)
rel_obj.pk = None # Reset the primary key before saving.
if _already_exists(rel_obj):
continue
if is_versioned(rel_obj):
rel_obj.save(comment=_("Parent page renamed"))
else:
rel_obj.save()
# Restore any m2m fields now that we have a new pk
for name, value in rel_obj._m2m_values.items():
setattr(rel_obj, name, value)
def rename_to(self, pagename):
"""
Renames the page to `pagename`. Moves related objects around
accordingly.
"""
def _get_slug_lookup(unique_together, obj, new_p):
d = {}
for field in unique_together:
d[field] = getattr(obj, field)
d['slug'] = new_p.slug
return d
def _already_exists(obj):
M = obj.__class__
unique_vals = unique_lookup_values_for(obj)
if not unique_vals:
return False
return M.objects.filter(**unique_vals).exists()
from redirects.models import Redirect
from redirects.exceptions import RedirectToSelf
if Page(slug=slugify(pagename), region=self.region).exists():
if slugify(pagename) == self.slug:
# The slug is the same but we're changing the name.
old_name = self.name
self.name = pagename
self.save(comment=_('Renamed from "%s"') % old_name)
return
else:
raise exceptions.PageExistsError(
_("The page '%s' already exists!") % pagename)
# Copy the current page into the new page, zeroing out the
# primary key and setting a new name and slug.
new_p = copy(self)
new_p.pk = None
new_p.name = pagename
new_p.slug = slugify(pagename)
new_p._in_rename = True
new_p.save(comment=_('Renamed from "%s"') % self.name)
# Get all related objects before the original page is deleted.
related_objs = self._get_related_objs()
# Cache all ManyToMany values on related objects so we can restore them
# later--otherwise they will be lost when page is deleted.
for attname, rel_obj_list in related_objs:
if not isinstance(rel_obj_list, list):
rel_obj_list = [rel_obj_list]
for rel_obj in rel_obj_list:
rel_obj._m2m_values = dict(
(f.attname, list(getattr(rel_obj, f.attname).all()))
for f in rel_obj._meta.many_to_many)
# Create a redirect from the starting pagename to the new pagename.
redirect = Redirect(source=self.slug,
destination=new_p,
region=self.region)
# Creating the redirect causes the starting page to be deleted.
redirect.save()
# Point each related object to the new page and save the object with a
# 'was renamed' comment.
for attname, rel_obj in related_objs:
if isinstance(rel_obj, list):
for obj in rel_obj:
obj.pk = None # Reset the primary key before saving.
try:
getattr(new_p, attname).add(obj)
if _already_exists(obj):
continue
if is_versioned(obj):
obj.save(comment=_("Parent page renamed"))
else:
obj.save()
# Restore any m2m fields now that we have a new pk
for name, value in obj._m2m_values.items():
setattr(obj, name, value)
except RedirectToSelf, s:
# We don't want to create a redirect to ourself.
# This happens during a rename -> rename-back
# cycle.
continue
else:
# This is an easy way to set obj to point to new_p.
setattr(new_p, attname, rel_obj)
rel_obj.pk = None # Reset the primary key before saving.
if _already_exists(rel_obj):
continue
if is_versioned(rel_obj):
rel_obj.save(comment=_("Parent page renamed"))
else:
rel_obj.save()
# Restore any m2m fields now that we have a new pk
for name, value in rel_obj._m2m_values.items():
setattr(rel_obj, name, value)
