JSON Key Lookup

RE: JSON Key Lookup

vijay — Tue, 11 Dec 2018 13:42:02 GMT

Hi, Please find the below code, little lengthy but might help to your requirement:

with(
local!json: "{
""09/03/2017"": {
""total"": 5
},
""10/03/2017"": {
""total"": 10
}
}",
/*Convert into Appian value*/
local!data: a!fromJson(
local!json
),
/*Split to fetch key type date values*/
local!divideTheData: split(
split(
local!data,
":"
),
","
),
/*To remove unwanted characters*/
local!updatedData: a!forEach(
local!divideTheData,
stripwith(
fv!item,
"["
)
),
local!fetchDesiredData: a!forEach(
local!updatedData,
if(
find(
"/",
fv!item
),
true(),
null
)
),
index(
local!updatedData,
where(
local!fetchDesiredData
)
)
)

RE: JSON Key Lookup

shubhamg0005 — Tue, 11 Dec 2018 11:07:45 GMT

[Try this rule . I have made json from myself and it will gives all the key from Json ]

a!forEach(
items: split(
a!toJson(
{
x: 1,
y: 2,
z: 3
}
),
","
),
expression: split(fv!item,"""")[2])

RE: JSON Key Lookup

Josh — Wed, 08 Mar 2017 19:33:42 GMT

Here is an Appian implementation for your data model. Note that it could probably be cleaned up and it may not work for other data models! Also, you want the "values" here, the "keys" are the dates in your dictionary.

with(
local!json: "{
""09/03/2017"": {
""total"": 5
},
""10/03/2017"": {
""total"": 5
}
}",
local!dictionary: a!fromJson(local!json),
local!objects: split(tostring(local!dictionary), ","),
local!keysRaw: apply(
mid(_, 1, 11),
local!objects
),
local!keysStripped: apply(stripwith(_, "[]:"), local!keysRaw),
apply(index(local!dictionary, _, {}), local!keysStripped)
)

RE: JSON Key Lookup

PhilB — Wed, 08 Mar 2017 16:02:58 GMT

Oh and I should add that the date regex could definitely be tightened up - but works ok for this example.

RE: JSON Key Lookup

PhilB — Wed, 08 Mar 2017 15:59:51 GMT

Just FYI, to access the actual values in the response, just use dot notation (ie .total) on the closing bracket of the apply, or wrap the apply in an index().

RE: JSON Key Lookup

PhilB — Wed, 08 Mar 2017 15:58:19 GMT

I was going to suggest using a!jsonPath, but it appears it's impossible to get the key names in that manner. Arguably the JSON here, whilst syntactically valid, isn't really logically valid. However, it is possible to extract the keys from the JSON using a regex, and then loop over them - but it does require the regex plugin:

= with(
local!json: "{
""09/03/2017"": {
""total"": 5
},
""10/03/2017"": {
""total"": 5
}
}",
apply(
fn!index(
a!fromJson(
local!json
),
_,
null
),
fn!regexallmatches(
"([0-9]{2}\\/[0-9]{2}\\/[0-9]{4})",
local!json
)
)
)