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Django Form does not load MultipleChoiceField data from ajax POST request

I ve a weird issue with a MultipleChoiceField that does not return the items that are in the POST QueryDict
here is the Form
class TranslationLanguagesForm(forms.Form):
languages = forms.MultipleChoiceField(
widget=forms.SelectMultiple(attrs={"novalidate": "",}),
choices=languages,
required=False,
)
the View is something like (shortened):
class AjaxSpotlerCreateView(View):
def post(self,request):
# ...
# some code before
#
translation_form = TranslationLanguagesForm(
self.request.POST, prefix="translation"
)
if translation_form.is_valid():
translation_languages = translation_form.cleaned_data.get(
"languages"
)
#
# some code after
#
I won't write the whole template but the html created by the form fits what I expected:
<select name="translation-languages" novalidate="" class="form-control " id="id_translation-languages" multiple="">
<option value="fr">french</option>
<option value="en">english</option> <option value="es">spanish</option> </select>
The jquery that sends the data trough ajax request is given below:
function ajaxPOST() {
var dismiss = false;
$.ajax({
method: "POST",
url: ajaxURL,
data: getFormData(),
beforeSend: function () {},
success: function (data) {
$target.find(".modal-content").html(data);
if (data.length == 0) dismiss = true;
},
complete: function () {
if (dismiss) hideUploadModal();
else showUploadModal();
}, //complete
}); //ajax
}
function getFormData() {
const result = {};
const $form = $target.find("form#video-loader-form");
const $inputs = $form.find("input, select, textarea");
$inputs.each((_, element) => {
const $element = $(element);
const type = $element.attr("type");
const name = $element.attr("name");
if (name && type == "checkbox" && $element.prop("checked"))
result[name] = $element.prop("checked");
else if (name && type != "checkbox") result[name] = $element.val();
});
return result;
}
the issue is that the form is never "filled" by the data of request.POST and translation_languages receives always an empty list.
...but self.request.POST.getlist("translation-languages[]") returns the correct values
It only happened on MultipleChoiceField whereas ChoiceField returns the correct value
here are the POST data (you see more data than needed by the form with the issue because there are 4 forms and 1 formset in the view) :
<QueryDict: {'csrfmiddlewaretoken':
['bQQzHTR4JDFZFnmO1ExlPZhqURHswXTmXA9RGC2c05pBM63ns2gnVwUnbnwGzor1'],
'transcription-language': ['en-us'], 'translation-languages[]': ['fr',
'es'], 'spotlers-TOTAL_FORMS': ['1'], 'spotlers-INITIAL_FORMS': ['1'],
'spotlers-MIN_NUM_FORMS': ['0'], 'spotlers-MAX_NUM_FORMS': ['1000'],
'spotlers-0-url':
['https://test-dev-s.storage.googleapis.com/uploads/FR/5e24512/2021/1/9fccac26/9fc37a26-2545-434f-8bd2-0afc3df839aa_full.mp4?X-Goog-Algorithm=GOOG4-RSA-SHA256&X-Goog-Credential=storage%40funky-tower-264412.iam.gserviceaccount.com%2F20210108%2Fauto%2Fstorage%2Fgoog4_request&X-Goog-Date=20210108T125533Z&X-Goog-Expires=3600&X-Goog-SignedHeaders=host&x-goog-signature=8e737cbc384fab5e11002cbc5e6308'], 'spotlers-0-id': ['9fc37a26-1893-434f-8bd2-0afc3df839ef'],
'spotlers-0-name': ['ultraclimb'], 'spotlers-0-duration':
['00:02:43'], 'spotlers-0-is_postedited': ['true'],
'keywords-keywords': [''], 'glossary-glossary': ['']}>
It seems also that the dict returned by ajax POST creates a weird name for multiselect. The name of the field is postfixed by array symbols : []...
So I got 'translation-languages[]': ['fr', 'es'] instead of having 'translation-languages': ['fr', 'es']

well finally I got it !
the problem was in the way I have built the POST data in the jquery.
I created a dict by collecting all inputs fields names and values but it returned a querydict with a wrong field name for array by postfix it with brackets.
I should rather use $form.serialize()
I've made that change and it's now working as expected

A bit late, but you can set the traditional parameter to true to the ajax call. This way, jQuery will use jQuery.param(yourObject, true) instead of simply jQuery.param(yourObject).
You keys referring to list of values will not be altered.
https://api.jquery.com/jQuery.param/
https://api.jquery.com/jquery.ajax/ (see at the data settings explanation)
Cheers,

Sort Swagger Tags

Hi I'm using flasgger/swagger but I was wondering if there are feature where in I could sort all my tags in alphabetical order? right I don't understand the order of my tags. It's neither Alpha nor Numeric. Sample order is like this
User
- API GET
- API POST
- API PUT
- API DELETE
Company
- API GET
- API POST
- API PUT
- API DELETE
Room
- API GET
- API POST
- API PUT
- API DELETE
So basically User, Company and Rooms are Swagger Tags. I would like to arrange it where in Company should come first then followed by Room then User. Is there a way to achieve this in swagger 2.0
Updates:
I would like it to be sorted in web browser display. In short on how we see the presentation of all this Tags in sorted order

For everyone who have problem with tag order, you can do it with javascript (sample is sorting alphabetically ascending, but you can change sort function as you wish):
$(document).ready(function () {
sort();
});
function sort() {
ascending = true;
var tbody = document.getElementById("resources");//ul
var rows = tbody.childNodes;//li
var unsorted = true;
while (unsorted) {
unsorted = false
for (var r = 0; r < rows.length - 1; r++) {
debugger;
var row = rows[r];
var nextRow = rows[r + 1];
var value = row.getAttribute("id");
var nextValue = nextRow.getAttribute("id");
if (ascending ? value > nextValue : value < nextValue) {
tbody.insertBefore(nextRow, row);
unsorted = true;
}
}
}
}
This JS you should register as it is shown in example bellow (Web api / c# / .net)
config.EnableSwagger(c =>
{
***
})
.EnableSwaggerUi(u =>
{
u.InjectJavaScript(typeof(Startup).Assembly, "yourNamespace.SwaggerExt.js");
}
);
JS file should be embedded resource.

Django Rest Framework + Angular 2 - uploading multiple files

I'm using Django Rest Framework as my backend and Angular 2 for my frontend. I've got this page in Angular, where I create a form:
createResourcesForm() {
this.resourcesForm = this.formBuilder.group({
resources: this.formBuilder.array([
this.formBuilder.group({
title: ['', Validators.compose([Validators.required])],
file: ['', Validators.compose([])],
})
])
})
}
As you can see, the form consists of FormArray, where every element has two inputs: title and file - a text input and a file input respectively. On submitting the form I'm trying to send the data to Django but I get an error Missing filename. Request should include a Content-Disposition header with a filename parameter.. I could set it easily but I'm expecting to receive a list of {title, file}, so how to set multiple file names? Any other idea how I could do this?
The error in Django Rest Framework comes from parse method in FileUploadParser.
I'm not pasting any Python code here because it's a standard ListCreateAPIView, nothing special about it. Here is my serializer:
class ResourceCreateSerializer2(serializers.Serializer):
author_pk = serializers.IntegerField(required=False)
author_first_name = serializers.CharField(max_length=50, required=False)
author_last_name = serializers.CharField(max_length=50, required=False)
resources = ResourceWithoutAuthorSerializer(many=True)
class ResourceWithoutAuthorSerializer(serializers.ModelSerializer):
instruments = InstrumentSerializer(many=True)
class Meta:
model = MusicResource
fields = ['title', 'file', 'instruments']
Don't mind the other fields, they are being sent just fine (as the file does). One more thing to say - I'm adding a content-type header in Angular just before sending the data.
UPDATE 1
Here is my method for uploading files (Angular 2):
get value() {
let formData = new FormData();
for (let i = 0; i < this.resources.length; i++) {
let resource = this.resources.value[i];
let fileName = resource.file;
let fileInputs = $('input[type="file"]').filter(function () {
return this.value == fileName;
});
if (fileInputs.length == 0) {
return null;
}
let fileInput = <HTMLInputElement>fileInputs[0];
formData.append('resources-' + i + '-title', resource.title);
formData.append('resources-' + i + '-file', fileInput.files[0], fileInput.files[0].name);
for (let j = 0; j < this.instrumentsSelect.value.length; j++) {
formData.append('resources-' + i + '-instruments', this.instrumentsSelect.value[j]);
}
}
return formData;
}
then
this.musicResourcesService.addMusicResource(toSend).subscribe(
data => console.log('successfuly added resources'),
err => console.log('MusicResourcesAddComponent', 'onMusicResourceFormSubmit', err)
);
addMusicResource(data) {
let headers = new Headers({});
headers.append('Content-Type', 'multipart/form-data');
headers.append('Accept', 'application/json');
let options = new RequestOptions({headers});
return this.api.post('resources/resources/list_create/', data, true, options);
}
public post(url: any, payload: any, noToken?, options?: any): Observable<any> {
const provider = noToken ? this.http : this.authHttp;
const fulLUrl = this.conf.getAPIUrl() + url;
return provider.post(fulLUrl, payload, options)
.delay(100)
.map(this.extractData)
.catch(this.handleError).share();
}

I did not like #Robert's answer and did not receive any other idea so after hours of reseraching it turns out that I was missing two things:
The parser should have been set to MultiPartParser, not FileUploadParser
There is no need to set the Content-Type header manually, it will get filled automatically along with the boundary which I was missing
Also, to make sure Django receives all the data and understands it, I had to change
formData.append('resources-' + i + '-title', resource.title);
and similar lines to
formData.append('resources[' + i + ']title', resource.title);

Return JSON object to View with Flask and Ajax

I am trying to return a python dictionary to the view with AJAX and reading from a JSON file, but so far I am only returning [object Object],[object Object]...
and if I inspect the network traffic, I can indeed see the correct data.
So here is how my code looks like. I have a class and a method which based on the selected ID (request argument method), will print specific data. Its getting the data from a python discretionary. the problem is not here, have already just tested it. But just in case I will link it.
# method to create the directionary - just in case #
def getCourselist_byClass(self, classid):
"""
Getting the courselist by the class id, joining the two tables.
Will only get data if both of them exist in their main tables.
Returning as a list.
"""
connection = db.session.connection()
querylist = []
raw_sql = text("""
SELECT
course.course_id,
course.course_name
FROM
course
WHERE
EXISTS(
SELECT 1
FROM
class_course_identifier
WHERE
course.course_id = class_course_identifier.course_id
AND EXISTS(
SELECT 1
FROM
class
WHERE
class_course_identifier.class_id = class.class_id
AND class.class_id = :classid
)
)""")
query = connection.engine.execute(raw_sql, {'classid': classid})
for column in query:
dict = {
'course_id' : column['course_id'],
'course_name' : column['course_name']
}
querylist.append(dict)
return querylist
my jsonify route method
#main.route('/task/create_test')
def get_courselist():
#objects
course = CourseClass()
class_id = request.args.get('a', type=int)
#methods
results = course.getCourselist_byClass(class_id)
return jsonify(result=results)
HTML
and here is how the input field and where it should link the data looks like.
<input type="text" size="5" name="a">
<span id="result">?</span>
<p>click me
and then I am calling it like this
<script type=text/javascript>
$(function() {
$('a#link').bind('click', function() {
$.getJSON("{{ url_for('main.get_courselist') }}", {
a: $('input[name="a"]').val()
}, function(data) {
$("#result").text(data.result);
});
return false;
});
});
</script>
but every time I enter a id number in the field, i am getting the correct data. but it is not formatted correctly. It is instead printing it like [object Object]
source, followed this guide as inspiration: flask ajax example

The data return by your server is like: {result: [{course_id: 'xxx', course_name: 'xxx'}]}, in which data.result is a JS Array.
when you set it to $("#result").text(), JS convert a array to string, so the result is [object Object].
You should iterate over the array to construct a string, then set the string in DOM, like:
courseStr = data.result.map(function(course) {return course.course_id + '-' + course.course_name; }).join(',');
$("#result").text(courseStr);

The API description for flask.json.jsonify indicates it's expecting keyword parameters. What you actually want to do seems to be serialize a list object containing dictionaries, have you tried flask.json.dumps instead? Assuming you've got the dumps symbol imported, instead of your jsonify call you can try:
return dumps(results)

web2py ajax issue onclick

I am trying to write a controller method and a corresponding view which will call the controller on web2py using Ajax. The idea is to make a small update on the database and return a simple updated message on a target div using Ajax. Below is contoller method:
def deleteajax():
recid1 = request.vars.recid
reptype1 = request.vars.reptype
if recid1 == None:
out = 'Missing Param : recid'
return out
if reptype1 == None:
reptype1 = 'pr'
if reptype1 == 'pr':
row = db2(db2.prs_mailed.id==recid1).select().first()
return str(row.id)
elif reptype1 == 'tb':
row = db2(db2.tbs_mailed.id==recid1).select().first()
else:
return 'Please provide the parameter : rep'
if row['action'] == 'D':
out = 'Already deleted'
return out
else:
row.update_record(action='D')
out = 'Deleted Successfully!'
return out
and this is how I am calling the same from view:
<form>{{
response.write('<input type="hidden" name="recid" value="'+str(response._vars['prs']['id'][k])+'"/>',escape=False)}}
<input type ='button' name="del" value = "D" onclick="ajax('deleteajax', ['reid'], 'target')" />
<div id="target"></div>
</form>
I have tested the controller individually using a POST call and that works. Even the AJAX call works and displays error messages like 'Missing Param : recid' on the target div. I even tried modifying the controller to show more messages after finishing each statement. However, post any database operation, no commands from the controller are getting executed, nor is anything showed on the target div. Where am I going wrong?

First, instead of this:
{{response.write('<input type="hidden" name="recid" value="' +
str(response._vars['prs']['id'][k])+'"/>',escape=False)}}
Just do this:
<input type="hidden" name="recid" value="{{=prs['id'][k])}}"/>
There's no need to use response.write or to access the "prs" object through response._vars (all the items in response._vars are available globally in the view environment).
Regarding the Ajax problem, your input element name is "recid", but your ajax() call refers to "reid". Change the latter to "recid" and see if it works.
UPDATE:
To create multiple unique recid's, you could do:
name="{{='recid%s' % prs['id'][k]}}"
Then, in the controller, check for request.vars that start with "recid":
recid = [v for v in request.post_vars if v.startswith('recid')]
if recid:
recid = int(recid[0][5:])
[code to delete record with id==recid]