This question already has an answer here:
JMeter JSON Extractor, extract all values of one key in a string
(1 answer)
Closed 5 years ago.
I would like to extract variable from a JSON output as an array of values. I use JSON extractor on Main samples and sub-samples. I got two variables, when I check it with a Debug sampler: myvariable has a single value and myvariable__matchNr=25. There are 25 occurences of this variable, so I need all the 25 values too.
Option Match No. in JSON extractor has to be -1 to get all the values with variable name: myvariable_X.
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This question already has an answer here:
Can I refer to one json object in another object in the same json file?
(1 answer)
Closed 2 years ago.
In a JSON file, how to set object value that is referred by another key : value pair in the same JSON file, (not in JAVA / any programming language).
"FRUIT_A":"Watermelon",
"FRUIT_B":"Mango",
"FRUIT_C":"Apple",
"FRUIT_D":"Grape",
// How to set the value with reference of another key.value.
"BIGGEST_FRUIT": ${FRUIT_A}, // <-- just a reference to explain what I want to achieve.
"SMALLEST_FRUIT": ${FRUIT_D}, // <-- another ref, don't know what notation.
Not sure, if it is possible to do within JSON file itself.
From above example, I basically want to set the values of keys as below:
"BIGGEST_FRUIT": "Watermelon",
"SMALLEST_FRUIT": "Grape",
JSON is a simple text based file which stores data in key value format. If you want to refer value of another key then there has to be some resolver which will resolve the reference and provide you the expected value.
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This question already has answers here:
MongoDB: How to query over a json string?
(1 answer)
Using stored JavaScript functions in the Aggregation pipeline, MapReduce or runCommand
(1 answer)
Closed 3 years ago.
In the context of metabase:
I am applying the following one-liner query to extract a particular field from a collection of mongodb documents:
[{"$project":{"myName":"$field1.field2" }},
{"$match":{"_id":{"$eq":"blah"}}} ]
myName is a string field that is in fact a serialized JSON object.
How can I adapt the pipeline above, perhaps using JSON.parse(), to pull out fields nested further down the JSON hierarchy?
Part II: How would I add a final step to extract some of those deeply nested fields? The situation is further complicated because the document structure is not consistent between documents...
Thanks!
This question already has answers here:
JSON and dealing with unexported fields
(2 answers)
Printing Empty Json as a result [duplicate]
(1 answer)
(un)marshalling json golang not working
(3 answers)
json.Marshal(struct) returns "{}"
(3 answers)
Closed 10 months ago.
I'm trying to marshal to JSON a struct Foo that has a Values map[string]CellValue property where CellValue is another struct. For some reason, the resultant JSON does not contain the data held in the CellValue struct even though all the keys in the Values map are present.
Here's a simple playground repro of the issue.
I'm new to Go, can anyone spot the problem here?
The fields of CellValue are unexported (start with a lowercase character). Per the documentation (emphasis mine), "Each exported struct field becomes a member of the object" - meaning unexported values are ignored when marshaling or unmarshaling.
This question already has answers here:
What is the minimum valid JSON?
(8 answers)
Closed 6 years ago.
Looking at json spec, I'm not sure whether a value is permitted to stand alone, or is only permitted as part of object or array structure.
This is valid JSON:
[123]
But is this valid JSON:
123
Per ECMA-404, The JSON Data Interchange Standard (pdf), which is linked from the JSON.org page you linked:
A JSON text is a sequence of tokens formed from Unicode code points that conforms to the JSON value grammar.
And:
A JSON value can be an object, array, number, string, true, false, or null.
As such, the value 123 is valid JSON, representing an integer.
A value is permitted to stand alone.
The rule has been changed a few years ago.
This question already has answers here:
Jmeter extracting fields/parsing JSON response
(6 answers)
Closed 6 years ago.
I have the JSON like this:
{"message":"[{\"file_name\":\"1464312906_84174_upload.jpg\",\"file_url\":\"uploads\\/tmp\\/1464312906_84174_upload.jpg\"}]","code":200}
How to get the string "1464312906_84174_upload.jpg" by JSON Expression?
message appears to be a JSON-encoded array. So parse it and then access the property you want.
JSON.parse(data.message)[0].file_name
Replace data with the variable containing the object you showed in the question.