如何使用FormRequest发布具有多个相同名称输入的表单？

Question

I am writing a web crawler with scrapy to deal with forms. The problem is that I have encountered a form with a lot of inputs with the same name. The tags are like these:

<input type="text" name="CRN_IN" size="6" maxlength="5" ID="crn_id1" />
<input type="text" name="CRN_IN" size="6" maxlength="5" ID="crn_id2" />
<input type="text" name="CRN_IN" size="6" maxlength="5" ID="crn_id3" />

The only thing to distinguesh them is the ID attribute. And I want to fill the one whoes ID='crn_id1' with some number. However as far as I kown scrapy can only fill blanks with the name attribute using formdata from the from_response method. Could anybody tell me how to use the from_response method to solve my problem. Or is there any other methods to solve(but within scrapy). Thank you very much.

Here is part of the html code from the website. Input with same names

Answer 1

The from_response method is only a helper to populate the input arguments of the specified form you want to request, but it is still a FormRequest where you can always override the formdata argument to send your own input arguments:

yield FormRequest.from_response(
    response=response,
    formdata={
        myinput='myvalue',
    }
)