我正在尝试将 json 补丁应用于 Mongoengine 文档。
我正在使用这些 json-patch 库:https://github.com/stefankoegl/python-json-patch和 mongoengine 0.14.3 与 python 3.6.3
这是我的实际代码:
json_patch = JsonPatch.from_string(jp_string)
document = Document.objects(id=document_id)
json_documents = json.loads(document.as_pymongo().to_json())
json_patched_document = json_patch.apply(json_documents[0])
Document.objects(id=document_id).first().delete()
Document
.from_json(json.dumps(json_patched_document))
.save(force_insert=True)
有没有更好的方法来保存编辑后的json文档?
我对代码做了一点改进:
json_patch = JsonPatch.from_string(jp_string)
document = Document.objects(id=document_id)
json_document = json.loads(document.as_pymongo().to_json())
json_patched_document = json_patch.apply(json_documents[0])
Document
.from_json(json.dumps(json_patched_document), created=True)
.save()
但是,有没有办法不把文档转成json呢?
最佳答案
我有一点类似的问题,我不想保存完整文档的部分,我只想更新修改/添加的字段。
这是我在以下输入上测试的代码:
def tryjsonpatch():
doc_in_db = {'foo': 'bar', "name": "aj", 'numbers': [1, 3, 7, 8]}
input = {'foo': 'bar', "name": "dj", 'numbers': [1, 3, 4, 8]}
input2 = {'foo': 'bar', "name": "aj", 'numbers': [1, 3, 7, 8], "extera": "12"}
input3 = {'foo': 'bar', "name": "dj", 'numbers': [1, 3, 4, 8], "extera": "12"}
patch = jsonpatch.JsonPatch.from_diff(doc_in_db, input3)
print("\n***patch***\n", patch)
doc = get_minimal_doc(doc_in_db, patch)
result = patch.apply(doc, in_place=True)
print("\n###result###\n", result,
"\n###present###\n", doc_in_db)
def get_minimal_doc(present, patch):
cur_dc = {}
for change in patch.patch:
if change['op'] not in ("add"):
keys = change['path'].split("/")[1:]
present_move = {}
old_key = 1
first = True
for key in keys:
if key.isdigit(): # old_key represented a array
cur_dc[old_key] = present_move
else:
if first:
cur_dc[key] = {}
first = False
else:
cur_dc[old_key][key] = {}
old_key = key
present_move = present[old_key]
return cur_dc
tryjsonpatch()
关于python - 将 json 补丁应用于 Mongoengine 文档,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53444802/