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Dynamically populate a form field based on a previous user entry

I have an application that is using Flask and wtforms and part of the functionality is to take user input for the first two fields and populate the remainder of the form fields which are of type SelectMultipleField (I'm going to refer to these as select fields) with choices from a database based on the first two fields (I'm going to refer to these as entry fields).
My issue right now is getting the select fields to dynamically populate. I found a solution here and this seems to be exactly what I need. It instantiates the select fields to all possible choices and then when it detects a JQuery "onchange" event in the entry fields, filters the select fields to choices based on the user entry for the entry fields. An example would be a user entering a specific company into the form and the select fields populating with "locations" only for that company.
However, in adapting this solution to my problem, I have not been able to get the code to run and I have researched far and wide and unable to resolve this. I'm new to both JQuery and Stack Overflow so any help would be greatly appreciated. Below is my code. Note that I am only focusing on one of the entry fields and dynamically populating just one of the select fields until I get this to work. Test_table is the entry field and test_join_key is the select field.
Here's the form with relevant fields-
class QaForm(FlaskForm):
test_table_in = StringField('Test Table', validators=[DataRequired()], id= 'test_table')
test_join_key = SelectMultipleField("Select Test Fields to Join on", choices=[], coerce=str, id = 'select_test_join_key')
Flask view to instantiate all the select fields -
#app.route('/', methods = ['GET', 'POST'])
#app.route('/home', methods = ['GET', 'POST'])
def home():
form = QaForm()
fields_query = f"""select column_name AS Fields from information_schema.columns group by 1;"""
conn.execute(fields_query)
result = conn.fetchall()
select_choices = [(column, column) for column in result]
form.test_join_key.choices = select_choices
Flask view to get choices for select fields based on user input for entry field -
#app.route('/_get_fields/<table>')
def _get_fields(table):
table = request.args.get(table, type=str)
fields_query = f"""select column_name AS Fields from information_schema.columns WHERE table_name = '{table}' group by 1;"""
conn.execute(fields_query)
result = conn.fetchall()
select_choices = [(column, column) for column in result]
return jsonify(select_choices)
JQuery to detect input in entry field and filter choices for select field (injected in HTML file)-
<script charset="utf-8" type="text/javascript">
$function() {
var dropdown = {
test_table: $('#test_table')
test_join_key: $('#select_test_join_key')
}
updateFields();
function updateFields() {
var send = {
test_table: dropdown.test_table.val()
};
dropdown.test_join_key.attr('disabled', 'disabled');
dropdown.test_join_key.empty();
$.getJSON("{{url_for('_get_fields') }}", send, function(data) {
data.forEach(function(item) {
dropdown.test_join_key.append(
$('<option>', {
value: item[0],
text: item[1]
})
);
});
dropdown.test_join_key.removeAttr('disabled');
});
}
dropdown.test_table.on('change', function() {
updateFields();
});
});
</script>
EDIT: Using #Ibsn suggestions, I was able to get the JQuery snippet to run for one form field. However, updating it to perform the same actions for multiple fields using parameters for the function again results in the code not running. I've checked to make sure my syntax is correct based on the tutorial on W3 schools as well as other Stack Overflow questions but still unable to get it to run. Here's the updated Jquery to detect input in entry fields and filter choices for select fields -
<script charset="utf-8" type="text/javascript">
$(function() {
var tables = {
test_table: $('#test_table'),
prod_table: $('#prod_table')
};
var fields = {
test_join_key: $('#select_test_join_key'),
prod_join_key: $('#select_prod_join_key'),
test_dimensions: $('#select_test_dimensions'),
prod_dimensions: $('#select_prod_dimensions'),
test_measures: $('#select_test_measures'),
prod_measures: $('#select_prod_measures')
};
updateFields(table, field);
function updateFields(table, field) {
var send = {
table: tables.table.val()
};
fields.field.attr('disabled', 'disabled');
fields.field.empty();
$.getJSON("{{url_for('_get_fields') }}", send, function(data) {
data.forEach(function(item) {
fields.field.append(
$('<option>', {
value: item[1],
text: item[0]
})
);
});
fields.field.removeAttr('disabled');
});
}
tables.test_table.on('change', function() {
updateFields(tables.test_table, fields.test_join_key);
updateFields(tables.test_table, fields.test_dimensions);
updateFields(tables.test_table, fields.test_measures);
});
tables.prod_table.on('change', function() {
updateFields(tables.prod_table, fields.prod_join_key);
updateFields(tables.prod_table, fields.prod_dimensions);
updateFields(tables.prod_table, fields.prod_measures);
});
});

There are a couple of syntax errors in your code.
$function() {} should be $(function(){}). And you're missing the comma between properties on var dropdown = {}
This is the updated version:
<script charset="utf-8" type="text/javascript">
$(function(){
var dropdown = {
test_table: $('#test_table'),
test_join_key: $('#select_test_join_key')
}
updateFields();
function updateFields() {
var send = {
test_table: dropdown.test_table.val()
};
dropdown.test_join_key.attr('disabled', 'disabled');
dropdown.test_join_key.empty();
$.getJSON("{{url_for('_get_fields') }}", send, function(data) {
data.forEach(function(item) {
dropdown.test_join_key.append(
$('<option>', {
value: item[0],
text: item[1]
})
);
});
dropdown.test_join_key.removeAttr('disabled');
});
}
dropdown.test_table.on('change', function() {
updateFields();
});
});
The OP updated the question with new requirements
If I understand correctly, you're trying to update all the test_ fields when test_table changes and all the prod_ fields when prod_table changes.
So this code should do that:
$(function () {
var tables = {
test_table: $('#test_table'),
prod_table: $('#prod_table')
};
// I'm organizing fields in two arrays, test and prod, for simplyfing iterate over each group
var fields = {
test: [$('#select_test_join_key'), $('#select_test_dimensions'), $('#select_test_measures')],
prod: [$('#select_prod_join_key'), $('#select_prod_dimensions'), $('#select_prod_measures')]
};
// This is for updating fields the first time
fields.test.forEach(item => updateFields(tables.test_table, item));
fields.prod.forEach(item => updateFields(tables.prod_table, item));
function updateFields(table, field) {
var send = {
table: table.val()
};
field.attr('disabled', 'disabled');
field.empty();
$.getJSON("{{url_for('_get_fields') }}", send, function (data) {
data.forEach(function (item) {
field.append(
$('<option>', {
value: item[0],
text: item[1]
})
);
});
field.removeAttr('disabled');
});
}
// Test fields and prod fields are two arrays now, so I can simply iterate through them
tables.test_table.on('change', function () {
fields.test.forEach(item => updateFields(tables.test_table, item));
});
tables.prod_table.on('change', function () {
fields.prod.forEach(item => updateFields(tables.prod_table, item));
});
});

How to implement Image reordering in meteor.js

Need to implement sortable functionality in Image Collection . Used rank value to sort the images .. For all categories it works ..
If images are categorized by category name it doesn't work ..
How to proceed further for different categories
Gallery.html
<div id="grid-container" class="cbp-l-grid-agency grid">
{{#each images getCurrentCategory}}
{{> image}}
{{/each}}
{{> addInfo}}
</div>
Gallery.js
Template.gallery.rendered = function(){
this.$('#grid-container').sortable({
stop: function(e, ui) {
el = ui.item.get(0)
before = ui.item.prev().get(0)
after = ui.item.next().get(0)
if(!before) {
newRank = Blaze.getData(after).rank - 1
} else if(!after) {
newRank = Blaze.getData(before).rank + 1
} else {
newRank = (Blaze.getData(after).rank + Blaze.getData(before).rank)/2
}
Images.update({_id: Blaze.getData(el)._id}, {$set: {rank: newRank}})
}
})
}
Template.gallery.helpers({
'getCurrentCategory': function() {
return Template.instance().currentcategory.get();
},
'images': function (currentcategory) {
if(currentcategory == 'all' || !currentcategory){
return Images.find({},{sort: {rank: 1}});
}
return Images.find({category:currentcategory});
}
});

If I understand your question correctly, you just need to do this:
return Images.find({category:currentcategory},{sort:{rank:1}})
It's the same as your all category cursor but with the added sort specifier.

How to group all product of single brand together - angular JS

Please see this JS fiddle link.
http://jsfiddle.net/4Dpzj/174/
This is the logic for group by
app.filter('groupBy', ['$parse', function ($parse) {
return function (list, group_by) {
var filtered = [];
var prev_item = null;
var group_changed = false;
// this is a new field which is added to each item where we append "_CHANGED"
// to indicate a field change in the list
//was var new_field = group_by + '_CHANGED'; - JB 12/17/2013
var new_field = 'group_by_CHANGED';
// loop through each item in the list
angular.forEach(list, function (item) {
group_changed = false;
// if not the first item
if (prev_item !== null) {
// check if any of the group by field changed
//force group_by into Array
group_by = angular.isArray(group_by) ? group_by : [group_by];
//check each group by parameter
for (var i = 0, len = group_by.length; i < len; i++) {
if ($parse(group_by[i])(prev_item) !== $parse(group_by[i])(item)) {
group_changed = true;
}
}
}// otherwise we have the first item in the list which is new
else {
group_changed = true;
}
// if the group changed, then add a new field to the item
// to indicate this
if (group_changed) {
item[new_field] = true;
} else {
item[new_field] = false;
}
filtered.push(item);
prev_item = item;
});
return filtered;
};
I want to group all the products together.
what changes i need to do ?

I come up with this in my mind. Without using any custom filters.
I simply use this ng-repeat syntax :
ng-repeat="(key,item) in MyList | orderBy:orderKey"
Thanks to it i can get the key to compare the value with the previous object.
Here is my ng-show attribute. It can be improved by sorting the list somewhere else (like in the controller)
<h2 ng-show="(MyList | orderBy:orderKey)[key-1][orderKey] !== (MyList | orderBy:orderKey)[key][orderKey]"
Thanks to this you can populate your var "orderKey" with any of your attribute name and this will works.
See it working in this JSFiddle
Hope it helped.
EDIT :
I think it would be a bit cleaner to use a temporary list to manage the visual order (see it in this JSFiddle):
JS :
$scope.orderList = function(){
$scope.orderedList = $filter('orderBy')($scope.MyList,$scope.orderKey);
}
HTML :
ng-change="orderList()" To trigger the list sort
The cleaner ng-repeat / ng-show
<div ng-repeat="(key,item) in orderedList">
<h2 ng-show="orderedList[key-1][orderKey] !== orderedList[key][orderKey]">{{item[orderKey]}} </h2>
<ul>
<li>{{item.ProductName}}</li>
</ul>
</div>

Have a look at this:
http://jsfiddle.net/4Dpzj/176/
<div ng-repeat="item in MyList | orderBy:['SubCategoryName','BrandName'] | groupBy:['SubCategoryName']" >
<h2 ng-show="item.group_by_CHANGED">{{item.SubCategoryName}} </h2>
<ul>
<li>{{item.ProductName}} --- {{item.BrandName}}</li>
</ul>
</div>

Images in JSON AngularJS

I'm new to AngularJS, so sometimes when I do some mistake that is obvious, I still can't figure out what is going wrong with my code. So saying, here is my doubt:
HTML code:
<body ng-controller = "Ctrl">
<script id="Page6.html" type="text/ng-template">
<div class="list card" style="background-color: beige">
<div class="item item-icon-left">
<i class="icon ion-home"></i>
<input type="text" placeholder = "Enter display name" ng-model="user.nam">
</div>
<a ng-click = "saveedit(user)"<button class="button button-clear">SAVE DETAILS</button></a>
</div>
</script>
</body>
CONTROLLER.JS
.controller('Ctrl',function($scope,$rootScope,ContactService){
$rootScope.saveedit=function(user) {
ContactService.save({names: user.nam, image:"images.jpg"},ContactService.getid("Donkey"));
}
});
THIS IS THE SERVICE:
.service('ContactService', function () {
var items = [
{ id: 1, names: 'Dolphin', image: 'dolphin.jpg',}, { id: 2, names: 'Donkey', image: 'donkey.jpg'}, { id: 3, empid: 'FG2043', image: 'penguin.jpg'}];
var im = [{image: ''}];
var ctr=0;
var uid=3;
this.save = function (contact,id) {
ctr=0;
for (i=0;i<items.length;i++) {
if(items[i].id == id)
{
im[0].image= items[i].image;
ctr=100;
break;
}
}
uid = (uid+1);
contact.id = uid;
items.push(contact);
if (ctr==100 ) {
alert("in save putting the image");
items[contact.id].image = im[0].image; //doubt
alert("finished putting image");
}
}
//simply search items list for given id
//and returns the object if found
this.getid = function (name) {
for (i=0;i<items.length;i++) {
if (items[i].names == name) {
return (i+1);
}
}
}
//simply returns the items list
this.list = function () {
return items;
}
});
The problem I am facing is this: Everything works, except one thing. In ContactService, push() function, the line I have commented as //doubt is not getting executed.
The alert before it "in save putting the image" runs, but the alert "finished putting image" doesn't. What is the mistake there??

The problem here is that you're using the id's, which start at 1, to navigate in an array whose indexes start at 0.
To access the most recently pushed element, you should rather do :
items[contact.id - 1].image = im[0].image;
But you actually don't need to access the array : items[contact.id - 1] will return the object that you just pushed, and which is already referenced by variable contact, so you could just do :
contact.image = im[0].image;

Properly using the data-bind visible property

I have a view that displays data from a foreach loop in different categories depending on the type. Each category will contain a number of users - I created an object that will check to see if the number of users in a category are more than 10 then the text for the visible bind will show. And for the category that doesn't have more than 10 it will not show the text.
My question: if the first category doesn't have 10 it won't show text does that mean that it won't also show text for the remaining categories?
Help with: the visible binding is not working even though a category would contain more than 10 and not sure why.
Here is my JSFiddle: http://jsfiddle.net/xNdJk/1/
JavaScript:
var userViewModel = function (data) {
var _self = this;
_self.Name = ko.observable(data.Name);
_self.Letter = ko.observable(data.Letter);
_self.ShowLetter = ko.computed(function () {
return (roleViewModel.UserCount > 13);
});
};
var typeViewModel = function (data) {
var _self = this;
_self.ContentType = ko.observable(data.ContentType);
_self.Name = ko.observable(data.Name);
_self.Rank = ko.observable(data.Rank);
_self.UserCount = ko.observable(data.UserCount);
_self.Users = ko.observableArray([]);
};
View:
<div class="collapse in" data-bind="template: { name: 'list', foreach: $data.Users }">
</div>
<div id="letter" data-bind="visible:ShowLetter, text: Letter"></div>

You are mixing classes and instances, you have created a secondModel class but you never instance it, here is a working example
http://jsfiddle.net/xNdJk/2/
var viewModel = function(){
this.Letter = ko.observable('Hello, World!');
this.secondModel = new secondModel();
this.shouldShowMessage = ko.computed(function() {
return (this.secondModel.UserCount() > 13);
}, this);
}
var secondModel = function(){
var self = this;
self.UserCount = ko.observable(153);
}