def get_links(self):
"""Returns all links used in the payload.
By default, this only includes pagination links. Subclasses can
provide additional links.
"""
links = {}
full_path = self.request.build_absolute_uri(self.request.path)
query_parameters = get_url_params_except(
self.request.GET, self.start_param, self.max_results_param)
if query_parameters:
query_parameters = '&' + query_parameters
if self.has_prev():
links[self.prev_key] = {
'method': 'GET',
'href': self.build_pagination_url(
full_path, self.get_prev_index(),
self.max_results, query_parameters),
}
if self.has_next():
links[self.next_key] = {
'method': 'GET',
'href': self.build_pagination_url(
full_path, self.get_next_index(),
self.max_results, query_parameters),
}
return links
def __init__(self, request, queryset, results_key="results",
prev_key="prev", next_key="next",
total_results_key="total_results",
default_max_results=25, max_results_cap=200,
serialize_object_func=None,
extra_data={}, *args, **kwargs):
try:
start = max(int(request.GET.get('start', 0)), 0)
except ValueError:
start = 0
try:
max_results = \
min(int(request.GET.get('max-results', default_max_results)),
max_results_cap)
except ValueError:
max_results = default_max_results
results = queryset[start:start + max_results]
total_results = queryset.count()
if total_results == 0:
results = []
elif serialize_object_func:
results = [serialize_object_func(obj)
for obj in results]
else:
results = list(results)
data = {
results_key: results,
total_results_key: total_results,
}
data.update(extra_data)
full_path = request.build_absolute_uri(request.path)
query_parameters = get_url_params_except(request.GET,
'start', 'max-results')
if query_parameters:
query_parameters = '&' + query_parameters
if start > 0:
data['links'][prev_key] = {
'method': 'GET',
'href': '%s?start=%s&max-results=%s%s' %
(full_path, max(start - max_results, 0), max_results,
query_parameters),
}
if start + len(results) < total_results:
data['links'][next_key] = {
'method': 'GET',
'href': '%s?start=%s&max-results=%s%s' %
(full_path, start + max_results, max_results,
query_parameters),
}
WebAPIResponse.__init__(self, request, obj=data, *args, **kwargs)
def querystring_with(context, attr, value):
"""Helper for querystring manipulation.
Often, we'll want to update only a single value in a querystring without
changing the others. This tag helps with that.
"""
existing_query = get_url_params_except(context['request'].GET, attr)
new_query = urlencode({attr.encode('utf-8'): value.encode('utf-8')})
if existing_query:
return '?%s&%s' % (existing_query, new_query)
else:
return '?%s' % new_query
def querystring_with(context, attr, value):
"""Helper for querystring manipulation.
Often, we'll want to update only a single value in a querystring without
changing the others. This tag helps with that.
"""
existing_query = get_url_params_except(context['request'].GET, attr)
new_query = urlencode({attr.encode('utf-8'): value.encode('utf-8')})
if existing_query:
return '?%s&%s' % (existing_query, new_query)
else:
return '?%s' % new_query
def render_listview(self, render_context=None):
"""
Renders the standard list view of the grid.
This can be called from templates.
"""
try:
if render_context is None:
render_context = self._build_render_context()
self.load_state(render_context)
extra_query = get_url_params_except(self.request.GET, 'page')
context = {
'datagrid': self,
'is_paginated': self.page.has_other_pages(),
'results_per_page': self.paginate_by,
'has_next': self.page.has_next(),
'has_previous': self.page.has_previous(),
'page': self.page.number,
'last_on_page': self.page.end_index(),
'first_on_page': self.page.start_index(),
'pages': self.paginator.num_pages,
'hits': self.paginator.count,
'page_range': self.paginator.page_range,
'extra_query': extra_query,
}
if self.page.has_next():
context['next'] = self.page.next_page_number()
else:
context['next'] = None
if self.page.has_previous():
context['previous'] = self.page.previous_page_number()
else:
context['previous'] = None
context.update(self.extra_context)
context.update(render_context)
return mark_safe(render_to_string(self.listview_template,
Context(context)))
except Exception:
trace = traceback.format_exc();
logging.error('Failed to render datagrid:\n%s' % trace,
extra={
'request': self.request,
})
return mark_safe('<pre>%s</pre>' % trace)
def querystring_with(context, attr, value):
"""Return the current page URL with a new query string argument added.
This makes it easy to add to or replace part of a query string for the
current page's URL, which may already contain a query string.
If the page URL already has a query string, a new item is added in the form
of ``&attr=value``. If it doesn't have a query string, this will start a
new one in the form of ``?attr=value``.
If the attribute already exists in the query string, its value will be
replaced.
Args:
context (django.template.context.RequestContext):
The Django template rendering context.
attr (unicode):
The name of the attribute for the new query string argument.
value (unicode):
The value of the attribute for the new query string argument.
Returns:
unicode:
The new URL with the modified query string.
Example:
.. code-block:: html+django
<a href="{% querystring_with "sorted" "1" %}">Sort</a>
"""
warnings.warn(
'{%% querystring_with "%(attr)s" "%(value)s" %%} is deprecated and '
'will be removed in a future version of Djblets. Please use '
'{%% querystring "mode" "%(attr)s=%(value)s" %%} instead.'
% {
'attr': attr,
'value': value,
},
RemovedInDjblets30Warning)
existing_query = get_url_params_except(context['request'].GET, attr)
new_query = urlencode({attr.encode('utf-8'): value.encode('utf-8')})
if existing_query:
result = '?%s&%s' % (existing_query, new_query)
else:
result = '?%s' % new_query
return escape(result)
def querystring_with(context, attr, value):
"""Return the current page URL with a new query string argument added.
This makes it easy to add to or replace part of a query string for the
current page's URL, which may already contain a query string.
If the page URL already has a query string, a new item is added in the form
of ``&attr=value``. If it doesn't have a query string, this will start a
new one in the form of ``?attr=value``.
If the attribute already exists in the query string, its value will be
replaced.
Args:
context (django.template.context.RequestContext):
The Django template rendering context.
attr (unicode):
The name of the attribute for the new query string argument.
value (unicode):
The value of the attribute for the new query string argument.
Returns:
unicode:
The new URL with the modified query string.
Example:
.. code-block:: html+django
<a href="{% querystring_with "sorted" "1" %}">Sort</a>
"""
warnings.warn(
'{%% querystring_with "%(attr)s" "%(value)s" %%} is deprecated and '
'will be removed in a future version of Djblets. Please use '
'{%% querystring "mode" "%(attr)s=%(value)s" %%} instead.'
% {
'attr': attr,
'value': value,
},
RemovedInDjblets30Warning)
existing_query = get_url_params_except(context['request'].GET, attr)
new_query = urlencode({attr.encode('utf-8'): value.encode('utf-8')})
if existing_query:
result = '?%s&%s' % (existing_query, new_query)
else:
result = '?%s' % new_query
return escape(result)
def render_paginator(self, adjacent_pages=3):
"""Renders the paginator for the datagrid.
This can be called from templates.
"""
extra_query = get_url_params_except(self.request.GET,
'page', 'gridonly',
*self.special_query_args)
page_nums = range(max(1, self.page.number - adjacent_pages),
min(self.paginator.num_pages,
self.page.number + adjacent_pages)
+ 1)
if extra_query:
extra_query += '&'
context = {
'is_paginated': self.page.has_other_pages(),
'hits': self.paginator.count,
'results_per_page': self.paginate_by,
'page': self.page.number,
'pages': self.paginator.num_pages,
'page_numbers': page_nums,
'has_next': self.page.has_next(),
'has_previous': self.page.has_previous(),
'show_first': 1 not in page_nums,
'show_last': self.paginator.num_pages not in page_nums,
'extra_query': extra_query,
}
if self.page.has_next():
context['next'] = self.page.next_page_number()
else:
context['next'] = None
if self.page.has_previous():
context['previous'] = self.page.previous_page_number()
else:
context['previous'] = None
context.update(self.extra_context)
return mark_safe(render_to_string(self.paginator_template,
Context(context)))
def render_paginator(self, adjacent_pages=3):
"""Renders the paginator for the datagrid.
This can be called from templates.
"""
extra_query = get_url_params_except(self.request.GET, 'page',
*self.special_query_args)
page_nums = range(
max(1, self.page.number - adjacent_pages),
min(self.paginator.num_pages, self.page.number + adjacent_pages) +
1)
if extra_query:
extra_query += '&'
context = {
'is_paginated': self.page.has_other_pages(),
'hits': self.paginator.count,
'results_per_page': self.paginate_by,
'page': self.page.number,
'pages': self.paginator.num_pages,
'page_numbers': page_nums,
'has_next': self.page.has_next(),
'has_previous': self.page.has_previous(),
'show_first': 1 not in page_nums,
'show_last': self.paginator.num_pages not in page_nums,
'extra_query': extra_query,
}
if self.page.has_next():
context['next'] = self.page.next_page_number()
else:
context['next'] = None
if self.page.has_previous():
context['previous'] = self.page.previous_page_number()
else:
context['previous'] = None
context.update(self.extra_context)
return mark_safe(
render_to_string(self.paginator_template, Context(context)))
def get_toggle_url(self, state):
"""
Returns the URL of the current page with this column's visibility
toggled.
"""
columns = [column.id for column in state.datagrid.columns]
if state.active:
try:
columns.remove(self.id)
except ValueError:
pass
else:
columns.append(self.id)
url_params = get_url_params_except(state.datagrid.request.GET,
'columns')
if url_params:
url_params = url_params + '&'
return "?%scolumns=%s" % (url_params, ",".join(columns))
def get_toggle_url(self, state):
"""
Returns the URL of the current page with this column's visibility
toggled.
"""
columns = [column.id for column in state.datagrid.columns]
if state.active:
try:
columns.remove(self.id)
except ValueError:
pass
else:
columns.append(self.id)
url_params = get_url_params_except(state.datagrid.request.GET,
'columns')
if url_params:
url_params = url_params + '&'
return "?%scolumns=%s" % (url_params, ",".join(columns))
def querystring_with(context, attr, value):
"""Return the current page URL with a new query string argument added.
This makes it easy to add to or replace part of a query string for the
current page's URL, which may already contain a query string.
If the page URL already has a query string, a new item is added in the form
of ``&attr=value``. If it doesn't have a query string, this will start a
new one in the form of ``?attr=value``.
If the attribute already exists in the query string, its value will be
replaced.
Args:
attr (unicode):
The name of the attribute for the new query string argument.
value (unicode):
The value of the attribute for the new query string argument.
Returns:
unicode:
The new URL with the modified query string.
Example:
.. code-block:: html+django
<a href="{% querystring_with "sorted" "1" %}">Sort</a>
"""
existing_query = get_url_params_except(context['request'].GET, attr)
new_query = urlencode({attr.encode('utf-8'): value.encode('utf-8')})
if existing_query:
result = '?%s&%s' % (existing_query, new_query)
else:
result = '?%s' % new_query
return escape(result)
def get_header(self, state):
"""
Displays a sortable column header.
The column header will include the current sort indicator, if it
belongs in the sort list. It will also be made clickable in order
to modify the sort order appropriately, if sortable.
"""
datagrid = state.datagrid
in_sort = False
sort_direction = self.SORT_DESCENDING
sort_primary = False
sort_url = ""
unsort_url = ""
if self.sortable:
sort_list = list(datagrid.sort_list)
if sort_list:
rev_column_id = "-%s" % self.id
new_column_id = self.id
cur_column_id = ""
if self.id in sort_list:
# This column is currently being sorted in
# ascending order.
sort_direction = self.SORT_ASCENDING
cur_column_id = self.id
new_column_id = rev_column_id
elif rev_column_id in sort_list:
# This column is currently being sorted in
# descending order.
sort_direction = self.SORT_DESCENDING
cur_column_id = rev_column_id
new_column_id = self.id
if cur_column_id:
in_sort = True
sort_primary = (sort_list[0] == cur_column_id)
if not sort_primary:
# If this is not the primary column, we want to keep
# the sort order intact.
new_column_id = cur_column_id
# Remove this column from the current location in the list
# so we can move it to the front of the list.
sort_list.remove(cur_column_id)
# Insert the column name into the beginning of the sort list.
sort_list.insert(0, new_column_id)
else:
# There's no sort list to begin with. Make this column
# the only entry.
sort_list = [self.id]
# We can only support two entries in the sort list, so truncate
# this.
del(sort_list[2:])
url_params = get_url_params_except(
datagrid.request.GET,
"sort", "datagrid-id", "gridonly", "columns")
if url_params:
url_params = url_params + '&'
url_prefix = "?%ssort=" % url_params
unsort_url = url_prefix + ','.join(sort_list[1:])
sort_url = url_prefix + ','.join(sort_list)
ctx = Context({
'column': self,
'column_state': state,
'in_sort': in_sort,
'sort_ascending': sort_direction == self.SORT_ASCENDING,
'sort_primary': sort_primary,
'sort_url': sort_url,
'unsort_url': unsort_url,
})
return mark_safe(datagrid.column_header_template_obj.render(ctx))
def get_header(self, state):
"""
Displays a sortable column header.
The column header will include the current sort indicator, if it
belongs in the sort list. It will also be made clickable in order
to modify the sort order appropriately, if sortable.
"""
datagrid = state.datagrid
in_sort = False
sort_direction = self.SORT_DESCENDING
sort_primary = False
sort_url = ""
unsort_url = ""
if self.sortable:
sort_list = list(datagrid.sort_list)
if sort_list:
rev_column_id = "-%s" % self.id
new_column_id = self.id
cur_column_id = ""
if self.id in sort_list:
# This column is currently being sorted in
# ascending order.
sort_direction = self.SORT_ASCENDING
cur_column_id = self.id
new_column_id = rev_column_id
elif rev_column_id in sort_list:
# This column is currently being sorted in
# descending order.
sort_direction = self.SORT_DESCENDING
cur_column_id = rev_column_id
new_column_id = self.id
if cur_column_id:
in_sort = True
sort_primary = (sort_list[0] == cur_column_id)
if not sort_primary:
# If this is not the primary column, we want to keep
# the sort order intact.
new_column_id = cur_column_id
# Remove this column from the current location in the list
# so we can move it to the front of the list.
sort_list.remove(cur_column_id)
# Insert the column name into the beginning of the sort list.
sort_list.insert(0, new_column_id)
else:
# There's no sort list to begin with. Make this column
# the only entry.
sort_list = [self.id]
# We can only support two entries in the sort list, so truncate
# this.
del (sort_list[2:])
url_params = get_url_params_except(datagrid.request.GET, "sort",
"datagrid-id", "gridonly",
"columns")
if url_params:
url_params = url_params + '&'
url_prefix = "?%ssort=" % url_params
unsort_url = url_prefix + ','.join(sort_list[1:])
sort_url = url_prefix + ','.join(sort_list)
ctx = Context({
'column': self,
'column_state': state,
'in_sort': in_sort,
'sort_ascending': sort_direction == self.SORT_ASCENDING,
'sort_primary': sort_primary,
'sort_url': sort_url,
'unsort_url': unsort_url,
})
return mark_safe(datagrid.column_header_template_obj.render(ctx))
