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BIT90
Frequent Visitor

Help with Regex to cleanup data and parse JSON

Hello,

I am attempting to accept API data on a few of our aircraft and post that to an SP List.  I'm new to this process and am having a hard time parsing the data and getting the properties I want because of the format:

{

    "N840G": {

        "tail_number": "N840G",

        "airport_code": "",

        "pilot": [

            "Joe Smith"

        ],

        "fleet": "Air Attack",

        "contract": "",

        "contract_contact": "",

        "hobbs_start": 2842.6,

        "hobbs_end": 2844.3,

        "landings": 0,

        "cycles": 0,

        "drops": 0,

        "gallons": 0,

        "available_hours": 0,

        "status_totals": {

            "off_available": 24,

            "off_schedule_mx": 0,

            "off_unscheduled_mx": 0,

            "off_contract_issue": 0,

            "on_available": 0,

            "on_scheduled_mx": 0,

            "on_unscheduled_mx": 0,

            "on_weather": 0

        },

        "flight_hours_rev": 0.8,

        "flight_hours_non_rev": 0.9,

        "flight_hours_total": 1.7,

        "aircraft_status": "Off Contract - Available",

        "maintenace_next_mx_event": "",

        "maintenace_next_mx_interval": ""

    },

    "N95LF": {

        "tail_number": "N95LF",

        "airport_code": "",

        "pilot": [

            "Joe Smith",

            "Jane Smith"

        ],

        "fleet": "Air Attack",

        "contract": "",

        "contract_contact": "",

        "hobbs_start": 5866.9,

        "hobbs_end": 5870.5,

        "landings": 0,

        "cycles": 0,

        "drops": 0,

        "gallons": 0,

        "available_hours": 0,

        "status_totals": {

            "off_available": 24,

            "off_schedule_mx": 0,

            "off_unscheduled_mx": 0,

            "off_contract_issue": 0,

            "on_available": 0,

            "on_scheduled_mx": 0,

            "on_unscheduled_mx": 0,

            "on_weather": 0

        },

        "flight_hours_rev": 3.6,

        "flight_hours_non_rev": 0,

        "flight_hours_total": 3.6,

        "aircraft_status": "Off Contract - Available",

        "maintenace_next_mx_event": "",

        "maintenace_next_mx_interval": ""

    },

 

There are quite a few more aircraft but the format is the same for them all.  I have been attempting to follow the advice here: 

https://powerusers.microsoft.com/t5/Building-Flows/Parse-JSON-Dynamic-Object-as-field-name/td-p/1346..., but I get an error on the JSON step: 

Unable to process template language expressions in action 'Compose_JSON' inputs at line '0' and column '0': 'The template language function 'JSON' parameter is not valid. The provided value '[{"N840G":....cannot be parsed: 'Invalid property identifier character: {. Path '[0].N840G', line 1, position 431.'

It doesn't seem to like the "status totals" object but I'm at a loss for how to handle this.   Below is my flow, and regex used is the same as the example posted, except I moved the first JSON conversion to a separate compose action, just for visualization:  

BIT90_0-1654191033315.png

 

Compose Reformat = concat('[',replace(outputs('Compose_String'),'},''}},{'),']')

Select = json(concat('{',replace(last(split(string(item()),'{')), '}}','}')))

 

Any help would be greatly appreciated! 

1 ACCEPTED SOLUTION

Accepted Solutions
BIT90
Frequent Visitor

Alright I was able to get it working, although it is rather messy.  I had to add variables and compile the structure based on Array indexes.  

First, I have to initialize variables I'll use later: 

BIT90_0-1656433640164.png

Then I query the API, start manipulating the results, and initialize a few more variables I'll need in my upcoming Do until Loop: 

BIT90_1-1656434161486.png

Now I'll enter the Do until loop.  For some reason, the condition is skipped and I receive an error if I use a condition or number other than ArrayCount less than 3.  It was working fine with less than or equal to 1, but that broke when we added a few more aircraft and it ran 60 times, no matter how many objects were passed in. 

BIT90_2-1656434332258.png

Here's the loop with the steps expanded: 

BIT90_3-1656434413322.pngBIT90_4-1656434687512.png

BIT90_5-1656434733484.png

I'm still working on making it more efficient where I can and trying to sneak a condition in there so I'm not clearing the List and recreating it each iteration, but it at least removes the path and allows me to parse it.  

 

 

View solution in original post

6 REPLIES 6
edgonzales
Super User
Super User

@BIT90 

Hey there.  Have you tried the Parse JSON step?  I dropped your sample data into a Compose, and then used a Parse JSON action and it seemed to like it ok.

edgonzales_0-1654192420140.png

Let me know.

-Ed

 

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BIT90
Frequent Visitor

I have tried that but then it creates multiple properties for reference.  Instead of being able reference outputs('tail_number'), it creates, for example, outputs('N840G')?['tail_number'].  It will do this for each tail number and I haven't found a workaround to make the 'N840g' section a wildcard, so I thought I'd try this method.  

BIT90
Frequent Visitor

I see what's going wrong but I'm struggling to come up with a fix.

The 'Compose - Reformat' is removing the '{' for the nested object 'status_totals' which breaks everything else.  I've been playing with reinserting it or changing the expression, but so far nothing has worked. 

Weird, I didn't get that at all.  Are you clicking "Generate from sample" and then pasting your output JSON before clicking ok? 

BIT90
Frequent Visitor

Yes, I am.  Honestly, I took this on thinking it would be as easy as getting the data, parsing it, then selecting my fields, but this is turning out to be a difficult flow to learn as I go.    

 

It doesn't always group the similar fields together, so here's a shot showing many 'pilot' variables: 

BIT90_1-1654542913442.png

There's nothing to help distinguish one from the other during selection, but I have done a compose with all of the tail_numbers that were parsed.  They all take on the following format: 

 

BIT90_0-1654542735299.png

I've tried using a wildcard for the path, which I've seen others do on PA Desktop while retrieving Excel files that have dates in the name, but I have had no luck with them.  Some formats I've tried are:

 body('parse_json')?[]?[tail_number]

body('parse_json')?[*]?[tail_number]

body('parse_json')?[%]?[tail_number]

 

If there is a way to have that path be wild,  I haven't had any luck.

BIT90
Frequent Visitor

Alright I was able to get it working, although it is rather messy.  I had to add variables and compile the structure based on Array indexes.  

First, I have to initialize variables I'll use later: 

BIT90_0-1656433640164.png

Then I query the API, start manipulating the results, and initialize a few more variables I'll need in my upcoming Do until Loop: 

BIT90_1-1656434161486.png

Now I'll enter the Do until loop.  For some reason, the condition is skipped and I receive an error if I use a condition or number other than ArrayCount less than 3.  It was working fine with less than or equal to 1, but that broke when we added a few more aircraft and it ran 60 times, no matter how many objects were passed in. 

BIT90_2-1656434332258.png

Here's the loop with the steps expanded: 

BIT90_3-1656434413322.pngBIT90_4-1656434687512.png

BIT90_5-1656434733484.png

I'm still working on making it more efficient where I can and trying to sneak a condition in there so I'm not clearing the List and recreating it each iteration, but it at least removes the path and allows me to parse it.  

 

 

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