Beego：如何解析对象url参数？

The URL I am receiving looks like this:

/controller/action?columns[0][data]=foo&columns[1][data]=bar&columns[2][data]=bar&columns[3][data]=bar&columns[4][data]=bar

So I have an array of objects. How can I parse this into a slice of structs?

What I have in my controller action is this:

func (this *MyController) Foo() {

  type column struct{
    Data string
  }

  columns := []column{}

  if err := this.Ctx.Input.Bind(&columns, "columns"); err != nil {
    log.Fatal(err)
  } else {
    log.Println("OK, got:", columns)
  }

}

And the output of this is:

OK, got: [{} {} {} {} {} {}]

Bind successfully detects there are five columns but fails to map the data field. I experimented with this and believe there are two problems:

The bind seems to only support the exact syntax shown in the documentation:

?id=123&isok=true&ft=1.2&ol[0]=1&ol[1]=2&ul[]=str&ul[]=array&user.Name=astaxie

user.Name=astaxie works while user[Name]=astaxie does not.

The 2nd problem is, the lower case of data. My experiments have shown user.Name works while user.name does not.

So the data bind method expects me to get the parameters in the form columns[0].Data=foo while I have columns[0][data]=foo

The first one indeed works. But I have no control over the URL, I have to accept it as it is, with lower case data in square brackets. The request is generated by DataTables.