Develop Reference

Logic App bypass Null in filter query

I am building a Logic App that uses the Azure Resource connector to obtain a list of my resources. I would then like to filter the results to Microsoft.Compute resources that have a tag name and value of stop and normal.
Here is a snippet of resource that I receive back without any filters
{
"id": "/subscriptions/<subscription>/resourceGroups/Env1/providers/Microsoft.Compute/virtualMachines/MyVM1",
"name": "MyVM1",
"type": "Microsoft.Compute/virtualMachines",
"location": "westeurope",
"tags": {
"stop": "normal"
}
},
{
"id": "/subscriptions/<subscription>/resourceGroups/LogicApp/providers/Microsoft.Logic/workflows/DWSize-Check",
"name": "DWSize-Check",
"type": "Microsoft.Logic/workflows",
"location": "westeurope",
"tags": {}
}
As you can see, the bottom resource does not contain any tags, as with many others that will appear in the list
I use the standard Compose Filter Array connector to try and filter out from the value I receive back.
Here is the code that I wish to use for the filter command:
#and(contains(item()?['id'], '/Microsoft.Compute/virtualMachines/'), contains(item()?['tags'], variables('TagName')), contains(item()?['tags'], variables('TagValue')))
variables('TagName') and variables('TagValue') will be stop and normal, as show in the example tags listed in my results snippet.
However, because there is no tag values listed in other resources, such as Microsoft.Logic/workflows, I receive the following null error:
InvalidTemplate. The execution of template action 'Filter_array'
failed: The evaluation of 'query' action 'where' expression
'#contains(item()?['tags'], variables('TagValue'))' failed: 'The
template language function 'contains' expects its first argument
'collection' to be a dictionary (object), an array or a string. The
provided value is of type 'Null'.'.
Would anyone know how to get around this?
I have tried similar queries to this #contains(item().tags?.stop, variables('TagValue')) just to see if it picks up anything, but I'm still blocked by a null response :(
I tried the above with the help of the Workflow Definition Language, but still no dice. Any help would be greatly appreciated.
EDIT
In addition to the answer posted by Thomas, I have performed the following (image below) to filter out null from the results and get to the TagName, but I am still unable to get to the TagValue, even if I use contains:
#and(contains(item()?['tags'], variables('TagName')), contains(item()?['tags'], variables('TagValue')))
or event just trying to look for TagValue
#contains(item()?['tags'], variables('TagValue'))

You can check for null and return an empty value (an empty array in your case).
You can replace item()?['tags'] with this expression or create a variable :
if(equals(item()?['tags'], null), [], item()?['tags'])

How Do I See the Output of Changes to JSON

Updated to try to be more clear given the comments (Thank you for comments)
I apologize in advance for this question. I may just not have the vocabulary to properly research it. If I have an array of objects called restaurants stored in my project, for example:
restaurants: [
{
"name": "joes's pizza",
"url": "joespizza.com",
"social properties": {
"Facebook":"fb.com/pizza",
"Instagram":"instagram.com/pizza",
"googlePlus":"pizza+",
"Twitter":"twitter.com/pizza"
}
},
{
"name": "tony's subs",
"url": "tonys.com",
"social properties": {
"Facebook":"fb.com/subs",
"Instagram":"instagram.com/subs",
"googlePlus":"subs+",
"Twitter":"twitter.com/subs"
}
},
{....}
]
I then run a function to add a unique idea to all the objects in the array. The result of console.log(restaurants) is this:
{
"id": 3472,
"name": "joes's pizza",
"url": "joespizza.com",
"social properties": {
"Facebook":"fb.com/pizza",
"Instagram":"instagram.com/pizza",
"googlePlus":"pizza+",
"Twitter":"twitter.com/pizza"
}
},
{
"id": 9987,
"name": "tony's subs",
"url": "tonys.com",
"social properties": {
"Facebook":"fb.com/subs",
"Instagram":"instagram.com/subs",
"googlePlus":"subs+",
"Twitter":"twitter.com/subs"
}
},
{....}
]
I would now like to have this updated array of objects available to look at in my project, via the text editor, as a variable or restaurants.json file. How do I actually see the new modified json array and how do i save it so that i can work with it the same way i did this one above? I am currently doing this in the browser. I can see the results if i log it to the console but I need to be able to work with the new output. Thanks for taking the time to answer.

You can encode/decode JSON with JSON.stringify() and JSON.parse().
Aside from converting to/from JSON, you work with standard JS objects and arrays:
var array = JSON.parse(json_str);
array[0].address = "5th Avenue";
console.log(JSON.stringify(array));

Well, there's really not enough information in your question but I assume a few things:
You've loaded the json data from somewhere and it has been turned into a javascript object.
You've edited the object somehow and wish to convert it back to json and save the changes.
Assuming the above to be true, you just need to serialize the object back to json and submit it back to your server where you can save it in any manner you deem appropriate.
You can serialize the javascript object with JSON.stringify() (see https://stackoverflow.com/a/912247/4424504)
Add the serialized json to a hidden field on the form and submit it.
On the server when processing the form submission, grab the data from the hidden field and do with it what you wish.
Or get it back to the server any way you wish (ajax call, whatever) the key point is to serialize the object to a json string and save it
Hope that helps...

How to make a form submit return the specified result using AJAX & JSON?

I'm working on a basic year, make, model dependent drop down menu, but started working backwards. I'm currently working on making my success callback dependent on the model drop down selection. For instance, if I choose 2006, lexus, is250, I only want my success callback to display that vehicle.
Most of my code can be found http://codepen.io/cfavela/pen/bozie/ (make sure to collapse the CSS page to make it easier to read)
My results page (modelsTest.html) contains the following:
{
"Car": "2012 Chevrolet Avalanche",
"Price": "$10,999",
"Features": "Soft seats!"
"Img": "/css/img/2012_Avalanche.jpeg"
}
What I've tried to do is add another car using an array and $.each, but the problem with this result is that it returns every vehicle if I click on search. How can I make the success callback dependent on the model selected?

As I commented above, according to this SO How to read the post request parameters using javascript, you can not get post data at client side level, you would need a server side to do that.
So you could try using GET and form your query ($('#vehicle').val()) as part of query string, then base on the query string, do some javascript logic at modelsTest.html and return the json you want. (but I don't think this will work, because I don't think you can return pure json in a real html file, so guessing your modelsTest.html just contain json. but I could be wrong hence I leave this as a possible solution)
or do the filtering in the success: function() before append to the msg.

ExtJS manipulating propertygrid source information

I'm using a propertygrid in a similar fashion to a form, rendering a button in the propertygrid tbar to generate an AJAX request, passing the source information to a back-end function that runs a SQL script.
The process of getting the source information to the back-end is proving troublesome, however; while looking at the information in the browser debug console, the result looks like it can be iterated (sample info from console below):
[CNC: "", Cutter_ID: "", Dimension: "", ID: "71",
Internal_Finish: "Standard White", Item_No: "4", Material_ID: "N/A",
Production_Item_Type_ID: "Frame(s)", Production_Notes: "", Qty: "1",
Ready_by_Date: "31 Dec 2014", Survey_Notes: "",
Thickness_Depth: "95", Type_of_Work_ID: "Complete New"]
Selecting individual items can be done, i.e. I can get and set source['Qty'], for instance.
I cannot, however, pass the information in a manageable format; neither can I encode (or decode) the information from the source to JSON.
I would like to at least iterate through the source and append the information to a string, which is then encoded to JSON to pass to the back-end.
How does the propertygrid source work as a data source, since I clearly don't understand it correctly? What method can I employ to generate JSONable information from it?

Property grid's getSource method returns the source as an object, loop through it to append information
Sample fiddle here: https://fiddle.sencha.com/#fiddle/58o

Using jQuery's serializeArray with Rails forms

I'm trying to display an order summary on the final screen of a checkout process (buit in Rails 3). Nothing is submitted prior to this, so I'm using jQuery's serializeArray() to get all the names and values from the form fields, which works great. I collect a variety of nested attributes, so the returned array is rather busy, with names like order[donations_attributes][0][amount_in_dollars].
Is there a straightforward way, in Javascript (or using jQuery) to convert those names and values to a JSON string (which would make it way easier to work with to produce my summary output). For example, something like:
{
"order": {
"donations_attributes": [
{
"amount_in_dollars": 50.95,
"category": "Some Fund"
},
{
"amount_in_dollars": 90.92,
"category": "Some Other Fund"
}
],
"billing_address_attributes": {
"first_name": "Bob",
"last_name": "Smith",
"address1": "123 Whatever Street",
"and so on": "etc"
}
}
}
Keep in mind that I haven't submitted anything yet (nor can I), so I can't do it in Ruby. Is there a sort of obvious, straightforward way to do this, or will I need to parse out and build the string by hand?

You can pass that data as-is to the data parameter in JQuery.ajax(...), and it will end up in parama in the controller method and view for the action you call, .e.g params[:order][:donations_attributes][0][:category] == "Some Fund".
If you want to load a new url into the browser, you can use JQuery.serialize() on the data and append it to your url (with a `"?" in between) to create the URL with the appropriate query string.