cherrypy+sqlAlchemy+sqlAlchemy数据表:不可显示类型:dict

我正在尝试将jquery数据表服务器端处理与cherrypy&sqlAlchemy集成在一起,并得到一个关于“unhashashable type:'dict'”的错误。

我写的代码如下:

@cherrypy.tools.json_out()
def GET(self, *args, **kwargs):
    with GetDb().ScopedSession("Fetching detail for main page") as session:
        # defining columns
        columns = [
            ColumnDT(dbModels.DatabaseModel.Field1),
            ColumnDT(dbModels.DatabaseModel.Field2),
            # ...
        ]

        query = session.query(dbModels.DatabaseModel)

        # GET parameters
        params = kwargs  # I think this is what's causing the issue.

        print("==========================")
        print(params)
        print("==========================")

        # instantiating a DataTable for the query and table needed
        rowTable = DataTables(params, query, columns)

        # returns what is needed by DataTable
        result = rowTable.output_result()
        print("==========================")
        print(result)
        print("==========================")
        return result

“params”打印的结果如下(稍微被截断):

{'draw': '1', 'columns[0][data]': '', 'columns[0][name]': '', 'columns[0][searchable]': 'true' } 

结果输出如下:

{'draw': '1', 'recordsTotal': '125', 'recordsFiltered': '125', 'error': "unhashable type: 'dict'"}

我的怀疑是dataTables()调用不喜欢“jsonPath”这样的get参数(参见上面的“我认为这是导致问题的原因”部分),所以我很好奇是否有一种方法可以让cherrypy将**kwargs作为嵌套的键/值对返回,或者让函数将kwargs转换成嵌套的字典——或者,如果我完全错误,并且没有他的错误完全不同。:)

谢谢!

更多数据,如果有帮助:

网页呈现会显示一条警告:

DataTables warning: table id=active-jobs - unhashable type: 'dict'

单击“确定”会在数据表代码中产生类型错误:

datatables.min.js:52 Uncaught TypeError: Cannot read property 'length' of undefined
    at vb (datatables.min.js:52)
    at datatables.min.js:49
    at i (datatables.min.js:47)
    at Object.success (datatables.min.js:48)
    at fire (jquery-3.3.1.js:3268)
    at Object.fireWith [as resolveWith] (jquery-3.3.1.js:3398)
    at done (jquery-3.3.1.js:9305)
    at XMLHttpRequest.<anonymous> (jquery-3.3.1.js:9548)
vb @ datatables.min.js:52
(anonymous) @ datatables.min.js:49
i @ datatables.min.js:47
success @ datatables.min.js:48
fire @ jquery-3.3.1.js:3268
fireWith @ jquery-3.3.1.js:3398
done @ jquery-3.3.1.js:9305
(anonymous) @ jquery-3.3.1.js:9548
load (async)
send @ jquery-3.3.1.js:9567
ajax @ jquery-3.3.1.js:9206
sa @ datatables.min.js:48
lb @ datatables.min.js:49
P @ datatables.min.js:41
T @ datatables.min.js:43
ha @ datatables.min.js:60
e @ datatables.min.js:105
(anonymous) @ datatables.min.js:105
each @ jquery-3.3.1.js:354
each @ jquery-3.3.1.js:189
n @ datatables.min.js:95
h.fn.DataTable @ datatables.min.js:177
RebuildTable @ (index):128
(anonymous) @ (index):266
mightThrow @ jquery-3.3.1.js:3534
process @ jquery-3.3.1.js:3602
setTimeout (async)
(anonymous) @ jquery-3.3.1.js:3640
fire @ jquery-3.3.1.js:3268
fireWith @ jquery-3.3.1.js:3398
fire @ jquery-3.3.1.js:3406
fire @ jquery-3.3.1.js:3268
fireWith @ jquery-3.3.1.js:3398
ready @ jquery-3.3.1.js:3878
completed @ jquery-3.3.1.js:3888