如何将嵌套数据显示到树中?
我总是感谢任何进一步的建议。
我正在尝试开发一个简单的 extJS Ext 4.0.2a 脚本来将一些嵌套数据显示为拖放树。 为了尝试,我使用 http://docs.sencha.com/ext-js/4-0/#!/api/Ext.data.reader.Reader
数据以 users.json 文件形式给出:
{
"users": [
{
"id": 123,
"name": "Ed",
"orders": [
{
"id": 50,
"total": 100,
"order_items": [
{
"id" : 20,
"price" : 40,
"quantity": 2,
"product" : {
"id": 1000,
"name": "MacBook Pro"
}
},
{
"id" : 21,
"price" : 20,
"quantity": 3,
"product" : {
"id": 1001,
"name": "iPhone"
}
}
]
}
]
}
]
}
我希望显示数据作为一棵树,其第一级节点是用户,第二级节点是订单等。
从同一个文档中,我学习了如何定义我的模型(我相信):
Ext.define("User", {
extend: 'Ext.data.Model',
fields: [
'id', 'name'
],
hasMany: {model: 'Order', name: 'orders'},
proxy: {
type: 'ajax', // rest
url : 'users.json',
reader: {
type: 'json',
root: 'users'
}
}
})
;
Ext.define("Order", {
extend: 'Ext.data.Model',
fields: [
'id', 'total'
],
hasMany : {model: 'OrderItem', name: 'orderItems', associationKey: 'order_items'},
belongsTo: 'User'
});
Ext.define("OrderItem", {
extend: 'Ext.data.Model',
fields: [
'id', 'price', 'quantity', 'order_id', 'product_id'
],
belongsTo: ['Order', {model: 'Product', associationKey: 'product'}]
});
Ext.define("Product", {
extend: 'Ext.data.Model',
fields: [
'id', 'name'
],
hasMany: 'OrderItem'
});
接下来,我定义一个树存储和一个树面板(对于某些选定的字段):
var store = Ext.create('Ext.data.TreeStore', {
model: 'User',
autoLoad: true,
autoSync: true,
root: {
name: "Root node",
id: '0',
expanded: true
},
sorters: [{
property: 'id',
direction: 'ASC' // DESC
}]
});
var tree = Ext.create('Ext.tree.Panel', {
store: store,
displayField: 'name', // what nodes display (default->text)
columns: [{
xtype: 'treecolumn',
text: 'name',
dataIndex: 'name',
width: 150,
sortable: true
}, {
text: 'total',
dataIndex: 'total',
width: 150,
flex: 1,
sortable: true
}, {
text: 'price',
dataIndex: 'price',
width: 50,
flex: 1,
sortable: true
},{
text: 'quantity',
dataIndex: 'quantity',
width: 150,
flex: 1
}, {
text: 'id',
dataIndex: 'id',
flex: 1,
width: 15,
sortable: true
}],
collapsible: true,
viewConfig: {
plugins: {
ptype: 'treeviewdragdrop', // see Ext.tree.plugin.TreeViewDragDrop
nodeHighlightColor : '7B68EE',
nodeHighlightOnDrop : true,
nodeHighlightOnRepair: true,
enableDrag: true,
enableDrop: true
}
},
renderTo: 'tree-div',
height: 300,
width: 900,
title: 'Items',
useArrows: true,
dockedItems: [{
xtype: 'toolbar',
items: [{
text: 'Expand All',
handler: function(){
tree.expandAll();
}
}, {
text: 'Collapse All',
handler: function(){
tree.collapseAll();
}
}]
}]
});
});
我看到面板、根和第一级用户(作为子节点)的根)。我没有看到任何子节点(orders、order_items 等)。
我仔细查看了一些帖子,改进了很多东西,但仍然没有找到可行的解决方案。
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评论(2)
我面临着同样的任务,首先很高兴遇到你的帖子!
经过 5 个小时探索与之相关的官方文档:
我能够什么都不填充我的嵌套树存储比这个更好:(
在我的例子中,主要模型是 Camgroup,它有许多相机作为“cams”:它允许为每个组使用 .cams())
camgroups.json 返回这样的东西:
希望这会帮助你,尽管继续寻找更好的解决方案(定义合适的读者的问题)。
再次,在“Ext.data.reader.Reader”中,我可以看到 Reader 有配置属性“implicitInincludes”,该属性应该“自动解析响应对象中其他模型中嵌套的模型”,但我无法使其工作 =(
干杯,
伊利亚
I am facing the same task, and first was glad to run into your post!
After 5 hours of exploring the official docs regarding to it:
I was able to populate my nested treestore with nothing better than this:
(in my case the main model is Camgroup which hasMany Camera as 'cams': which allows to use .cams() for every group)
camgroups.json returns smth like this:
Hope this will help you though keep looking for a better solution (prob defining a proper reader).
Again, in "Ext.data.reader.Reader" I can see that Reader has config property 'implicitIncludes' which is supposed 'to automatically parse models nested within other models in a response object', but I cannot make it working =(
Cheers,
Ilya
进一步进步。
请参阅
http://www.sencha.com/forum/showthread.php?153986-Empty-column-something-I-can-t-get-with-Ext.data.TreeStore-and-or- Ext.tree.Panel
我感谢任何进一步的建议。
我取得了一些进步。看来我需要修改我的 json:
}
然后模型的以下定义有效:
});
因此,似乎根本不需要不同级别的嵌套数据的模型之间的关联。
它有效,尽管我不确定是否有缺点。
我仍在寻求你的建议,我通过尝试和错误,我还没有看到潜在的逻辑。
谢谢。
我有新的想法。使用唯一字符串“children”的技巧似乎不太好。
让我考虑一个非常简单的 json:
}
我希望得到的 extJS 树是:
模型只是
我得到的最终输出只是:
这是我的错误,还是缺少功能?有没有办法不改变我的json?
多谢
Further progress.
Please see at
http://www.sencha.com/forum/showthread.php?153986-Empty-column-something-I-can-t-get-with-Ext.data.TreeStore-and-or-Ext.tree.Panel
I appreciate any further advise.
I made some progress. It seems I need to modify my json:
}
Then the following definition of a model works:
});
So, it seems that associations among models for the different levels of my nested data are not needed at all.
It works, although I am not sure whether there are drawbacks or not.
I am still looking for your advise, I go by try&mistake, I do not see the underlying logic yet.
Thks.
I have second thoughts. The trick to use a unique string 'children' does not seem so good.
Let me consider a very simple json:
}
The extJS tree I wish to get is:
The model is just
The final output I get is just:
is it a mistake of mine, or a missing feature? is there a way out without to change my json?
Thanks a lot