Reading JSON from *.json File

RE: Reading JSON from *.json File

rakeshp0004 — Thu, 28 Nov 2019 11:55:47 GMT

Thanks for this one it helps to know that using null inside will result in error before hand.

RE: Reading JSON from *.json File

rakeshp0004 — Thu, 28 Nov 2019 11:55:01 GMT

Your post is the reason i stumbled on to readtextfromfile

Thanks :-)

RE: Reading JSON from *.json File

mudit — Fri, 31 Aug 2018 13:36:00 GMT

Thanks for reply. But in our case we are getting JSON from external system and it does not have a defined format.

The issue is now resolved as i stated above.

RE: Reading JSON from *.json File

roopeshv — Fri, 31 Aug 2018 12:27:33 GMT

Try this

load(
local!inputData: "{
""age"": 100,
""name"": ""xyz.com"",
""messages"":[""msg 1"",""msg 2"",""msg 3""]
}",

index(
{a!fromJson(
local!inputData
)},
"messages"
)
)

RE: Reading JSON from *.json File

mudit — Fri, 31 Aug 2018 12:03:20 GMT

Found an answer from this link. Thanks for quick reply everyone.

NOTE: I had null data in my JSON, i used substitute to replace null with "".

RE: Reading JSON from *.json File

mudit — Fri, 31 Aug 2018 11:54:15 GMT

OK I figured the issue in above example but, in my case i am still getting the same error though the JSON is valid when i checked it online

RE: Reading JSON from *.json File

mudit — Fri, 31 Aug 2018 10:21:01 GMT

I tried this but got this error.
Note: I used the same JSON you have added above

Expression evaluation error at function a!fromJson [line 2]: Error evaluating function fn!fromjson_appian_internal : The jsonText parameter was not valid JSON. Received: { "age":100, "name":"xyz.com", "messages":["msg 1","msg 2","msg 3"] }

RE: Reading JSON from *.json File

Robert Shankin — Thu, 30 Aug 2018 17:44:10 GMT

I think this is what you're looking for:

Assuming cons!SBX_DOCUMENT_JSON_EXAMPLE is a constant of type document, and the content of that document is:

{
"age":100,
"name":"xyz.com",
"messages":["msg 1","msg 2","msg 3"]
}

THEN

index(
  {a!fromJson(
    {fn!readtextfromfile(cons!SBX_DOCUMENT_JSON_EXAMPLE, true())}
  )},
  "messages"
)

RETURNS:

List of Text String: 3 items
    "msg 1"
    "msg 2"
    "msg 3"

AND

index(
  {a!fromJson(
    {fn!readtextfromfile(cons!SBX_DOCUMENT_JSON_EXAMPLE, true())}
  )},
  "age"
)

RETURNS:

RE: Reading JSON from *.json File

mudit — Thu, 30 Aug 2018 06:19:19 GMT

Hi Siva,

I have read above post. But the solution suggested there is to user readTextFromFile which i am already doing, the issue with that function is it converts data into a single text string . and thus we are not able to use fromJson.

RE: Reading JSON from *.json File

Siva — Thu, 30 Aug 2018 05:58:40 GMT

Hi muditm,

Please refer the below thread. It might help for your use case.

community.appian.com/.../reading-json-data-from-a-document

Thanks
Siva Chimata