如何通过 DjangoForms 使用实体组和祖先

发布于 2024-12-22 07:45:45 字数 1088 浏览 0 评论 0原文

我想重写 GAE djangoforms 文章中的示例以使其最显眼使用高复制数据存储在 Google App Engine 上提交表单（例如更新或添加新条目时）后的最新日期。

本文中的主要重复查询是：

query = db.GqlQuery("SELECT * FROM Item ORDER BY name")

我们将其翻译为：

query = Item.all().order('name')  // datastore request

此查询我想在提交表单后从高复制数据存储中获取最新更新的数据（仅在这些情况下，我假设我可以重定向到特定的网址）提交后仅使用最新数据的查询，在所有其他情况下我不会这样做）。

验证存储结果的表单的情况如下：

data = ItemForm(data=self.request.POST)
if data.is_valid():
    # Save the data, and redirect to the view page
    entity = data.save(commit=False)
    entity.added_by = users.get_current_user()
    entity.put()  // datastore request

从数据存储中获取最新条目以填充表单（用于编辑）的情况如下：

id = int(self.request.get('id'))
item = Item.get(db.Key.from_path('Item', id))  // datastore request
data = ItemForm(data=self.request.POST, instance=item)

那么如何将实体组/祖先键添加到这些数据存储查询中以反映表单提交后的最新数据。请注意，我不希望所有查询在填充表单（用于编辑）时和提交表单后都具有最新数据。

谁能帮我提供实际的代码示例？

原文

I would like to rewrite the example from the GAE djangoforms article to be show most up to date after submitting a form (e.g. when updating or adding a new entry) on Google App Engine using the High Replication Datastore.

The main recurring query in this article is:

query = db.GqlQuery("SELECT * FROM Item ORDER BY name")

which we will translate to:

query = Item.all().order('name')  // datastore request

This query I would like to get the latest updated data from the high replication datastore after submitting the form (only in these occasions, I assume I can redirect to a specific urls after submission which just uses the query for the latest data and in all other cases I would not do this).

validating the form storing the results happens like:

data = ItemForm(data=self.request.POST)
if data.is_valid():
    # Save the data, and redirect to the view page
    entity = data.save(commit=False)
    entity.added_by = users.get_current_user()
    entity.put()  // datastore request

and getting the latest entry from the datastore for populating a form (for editing) happens like:

id = int(self.request.get('id'))
item = Item.get(db.Key.from_path('Item', id))  // datastore request
data = ItemForm(data=self.request.POST, instance=item)

So how do I add entity groups/ancestor keys to these datastore queries to reflect the latest data after form submission. Please note, I don't want all queries to have the latest data, when populating a form (for editing) and after submitting a form.

Who can help me with practical code examples?

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伊面 2024-12-29 07:45:45

如果它在同一个块中，则您可以引用当前实例。
然后，一旦你put()它，你就可以通过以下方式获取它的id：

if data.is_valid():
    entity = data.save(commit=False)
    entity.added_by = users.get_current_user()
    entity.put()  
    id= entity.key().id() #this gives you inserted data id

If it is in the same block, you have reference of the current intance.
Then once you put() it, you can get its id by:

if data.is_valid():
    entity = data.save(commit=False)
    entity.added_by = users.get_current_user()
    entity.put()  
    id= entity.key().id() #this gives you inserted data id

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