如何使用Flask处理从jquery数据表发送的服务器端参数？ [英] How to process server side parameter sent from jquery datatables using Flask?

问题描述

启用服务器端处理后，在处理jquery数据表1.10发送的参数时遇到一些问题。我像这样在javascript端初始化了数据表：

I am having some issues in processing the parameters sent by jquery datatables 1.10 when server side processing is enabled. I initialized the datatable in the javascript side like this:

var table = $('#mytable').DataTable( {
                "processing": true,
                "serverSide": true,
                "ajax": {
                    'url': url,
                    'type': 'POST'
                },
                "columns": data
            } );

并使用以下命令在基于Flask的服务器中接收POST请求：

And receive the POST request in the Flask based server using this:

@app.route('/data/<data_key>', methods=['POST'])
def get_data(data_key):
    print request.form

    # do some processing here in order to filter data
    # ...

    return Response(json.dumps(data), status=200, mimetype='application/json')

为了过滤数据，我试图在request.form内部查找，但结果很奇怪，并且不能轻松地转换为对象数组。我得到这样的东西：

In order to filter the data I tried to look inside request.form but the result is weird and can't be transformed easily to an array of objects. I get somthing like this:

ImmutableMultiDict(
[
('columns[0][data]', u'ReportDate'), 
('draw', u'1'),
('columns[1][name]', u''), 
('columns[1][data]', u'FundName'),
('columns[0][orderable]', u'true'), 
('columns[1][searchable]', u'true'), 
('columns[1][orderable]', u'true'), 
('order[0][column]', u'0'), 
('columns[0][name]', u''), 
('order[0][dir]', u'asc'), 
('search[value]', u''), 
('columns[1][search][regex]', u'false'), 
('columns[0][search][value]', u''), 
('search[regex]', u'false'), 
('columns[1][search][value]', u''), 
('columns[0][search][regex]', u'false'), 
('start', u'0'), 
('length', u'10'), 
('columns[0][searchable]', u'true')
]
)

在他们说的jquery数据表文档：

In the jquery datatables documentation they say:

发送到服务器的order [i]和column [i]参数是信息数组：

The order[i] and columns[i] parameters that are sent to the server are arrays of information:

ord er [i]-是一个数组，定义要对多少列进行排序-即，如果数组长度为1，则将执行单列排序，否则将执行多列排序。

order[i] - is an array defining how many columns are being ordered upon - i.e. if the array length is 1, then a single column sort is being performed, otherwise a multi-column sort is being performed.

columns [i]-定义表中所有列的数组。

columns[i] - an array defining all columns in the table.

在两种情况下，i都是一个整数，将更改以指示该数组的值。在大多数现代的服务器端脚本环境中，这些数据将以数组的形式自动提供给您。

In both cases, i is an integer which will change to indicate the array value. In most modern server-side scripting environments this data will automatically be available to you as an array.

但是，Flask将此数据作为简单的字典提供，有没有一种方法可以轻松地将其转换为对象数组？

However, Flask provide this data as a simple dictionary, is there a way to transform it to an array of objects easily?

推荐答案

获取DataTable发送json

Get DataTable to send json

ajax: {
    url: "/api/data_table",
    type: "POST",
    data: function ( args ) {
      return { "args": JSON.stringify( args ) };
    }
},

在烧瓶中，解析json

In flask, parse the json

args = json.loads(request.values.get("args"))
columns = args.get("columns")

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