本文整理汇总了Python中nodeshot.core.nodes.models.Node.data[key]方法的典型用法代码示例。如果您正苦于以下问题：Python Node.data[key]方法的具体用法？Python Node.data[key]怎么用？Python Node.data[key]使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类nodeshot.core.nodes.models.Node的用法示例。
在下文中一共展示了Node.data[key]方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: save
# 需要导入模块: from nodeshot.core.nodes.models import Node [as 别名]
# 或者: from nodeshot.core.nodes.models.Node import data[key] [as 别名]
def save(self):
"""
save data into DB:
1. save new (missing) data
2. update only when needed
3. delete old data
4. generate report that will be printed
constraints:
* ensure new nodes do not take a name/slug which is already used
* validate through django before saving
* use good defaults
"""
self.key_mapping()
# retrieve all items
items = self.parsed_data
# init empty lists
added_nodes = []
changed_nodes = []
unmodified_nodes = []
# retrieve a list of all the slugs of this layer
layer_nodes_slug_list = Node.objects.filter(layer=self.layer).values_list('slug', flat=True)
# keep a list of all the nodes of other layers
other_layers_slug_list = Node.objects.exclude(layer=self.layer).values_list('slug', flat=True)
# init empty list of slug of external nodes that will be needed to perform delete operations
processed_slug_list = []
deleted_nodes_count = 0
# loop over every item
for item in items:
item = self._convert_item(item)
number = 1
original_name = item['name']
needed_different_name = False
while True:
# items might have the same name... so we add a number..
if item['slug'] in processed_slug_list or item['slug'] in other_layers_slug_list:
needed_different_name = True
number = number + 1
item['name'] = "%s - %d" % (original_name, number)
item['slug'] = slugify(item['name'])
else:
if needed_different_name:
self.verbose('needed a different name for %s, trying "%s"' % (original_name, item['name']))
break
# default values
added = False
changed = False
try:
# edit existing node
node = Node.objects.get(slug=item['slug'], layer=self.layer)
except Node.DoesNotExist:
# add a new node
node = Node()
node.layer = self.layer
added = True
# loop over fields and store data only if necessary
for field in Node._meta.fields:
# geometry is a special case, skip
if field.name == 'geometry':
continue
# skip if field is not present in values
if field.name not in item.keys():
continue
# shortcut for value
value = item[field.name]
# if value is different than what we have
if getattr(node, field.name) != value and value is not None:
# set value
setattr(node, field.name, value)
# indicates that a DB query is necessary
changed = True
if added or (node.geometry.equals(item['geometry']) is False
and node.geometry.equals_exact(item['geometry']) is False):
node.geometry = item['geometry']
changed = True
node.data = node.data or {}
# store any additional key/value in HStore data field
for key, value in item['data'].items():
if node.data[key] != value:
node.data[key] = value
changed = True
# perform save or update only if necessary
if added or changed:
try:
node.full_clean()
if None not in [node.added, node.updated]:
#.........这里部分代码省略.........