How do I select the whole JSON document by querying for multi level nested values? Here is example of my JSON:
{
"id": "6316194187233559482",
"type": "Hotel",
"attributes": [
{
"country": "Germany",
"officialNames": [
{
"name": "The Ritz-Carlton, Berlin",
"language": "GER"
}
],
"streetsAndCities": [
{
"city": "Berlin",
"cityLanguage": "GER",
"street": "Potsdamer Platz ",
"streetLanguage": "GER"
}
]
}
]
}
And I want to query it for "name" attribute. I have experimented with UNNEST function and I have no problem to acces first level of nested data i.e. "officialNames". But I don't know how to access "name" attribute. Referencing it by position e.g.:
SELECT * FROM document
UNNEST attributes as attributes
WHERE attributes[0].officialNames[0].name = "The Ritz-Carlton, Berlin"
Is not going to work as position of each attribute in JSON can change.
What do you mean by "position of each attribute in JSON can change"? Do you mean that the "attributes" and "officialNames" and "streetsAndCities" arrays can have additional entries and you want to search through all the entries?
If yes, then have a look at the ANY operator here:
https://docs.couchbase.com/server/6.0/n1ql/n1ql-language-reference/collectionops.html
Related
I have a nested JSON in a field that contains multiple important keys that I would like to retrieve as an array:
{
"tasks": [
{
"id": "task_1",
"name": "task_1_name",
"assignees": [
{
"id": "assignee_1",
"name": "assignee_1_name"
}
]
},
{
"id": "task_2",
"name": "task_2_name",
"assignees": [
{
"id": "assignee_2",
"name": "assignee_2_name"
},
{
"id": "assignee_3",
"name": "assignee_3_name"
}
]}]}
All the queries that I've tried so far fx ( $.tasks.*.assignees..id) and many others have returned
[
"assignee_1",
"assignee_2",
"assignee_3"
]
But what I need is:
[
["assignee_1"],
["assignee_2", "assignee_3"]
]
Is it possible to do with JSONPath or any script inside of it, without involving 3rd party tools?
The problem you're facing is that tasks and assignees are arrays. You need to use [*] instead of .* to get the items in the array. So your path should look like
$.tasks[*].assignees[*].id
You can try it at https://json-everything.net/json-path.
NOTE The output from my site will give you both the value and its location within the original document.
Edit
(I didn't read the whole thing :) )
You're not going to be able to get
[
["assignee_1"],
["assignee_2", "assignee_3"]
]
because, as #Tomalak mentioned, JSON Path is a query language. It's going to remove all structure and return only values.
I am new to JSON Path and I am trying to get 'id' corresponding to name='Candy' using JsonPath in below JSON payload.
{
"responsePayload": [
{
"content": {
"id": "101",
"name": "Candy"
},
"links": [
{
"rel": "self",
"link": "api/v1/sweets/101",
"id": "101"
}
]
},
{
"content": {
"id": "102",
"name": "Chocolate"
},
"links": [
{
"rel": "self",
"link": "api/v1/sweets/102",
"id": "102"
}
]
}
]
}
For this I tried Jsonpath $.responsePayload[0].content[?(#.name=='Candy')].id but that is not working. I am using https://jsonpath.com/ for testing this JsonPath. Please guide me how I can achieve required result.
You're really close. You need more of the path inside the expression.
$.responsePayload[?(#.content.name=='Candy')].content.id
The [0] you have in your response isolates the first element only, but it sounds like you want to iterate over the whole array in responsePayload. To do that, the filter expression selector [?(...)] must act on that array.
Next, the # represents the current item, and you can build a full path off of it. You can see how that works above.
Finally, the filter expression selector returns the full item when the expression returns true. So you then need to navigate into .content.id again to get the value you're after.
In my DB I have a column storing JSON. The JSON looks like this:
{
"views": [
{
"id": "1",
"sections": [
{
"id": "1",
"isToggleActive": false,
"components": [
{
"id": "1",
"values": [
"02/24/2021"
]
},
{
"id": "2",
"values": []
},
{
"id": "3",
"values": [
"5393",
"02/26/2021 - Weekly"
]
},
{
"id": "5",
"values": [
""
]
}
]
}
]
}
]
}
I want to create a migration script that will extract a value from this JSON and store them in its own column.
In the JSON above, in that components array, I want to extract the second value from the component with an ID of "3" (among other things, but this is a good example). So, I want to extract the value "02/26/2021 - Weekly" to store in its own column.
I was looking at the JSON_VALUE docs, but I only see examples for specifing indexes for the json properties. I can't figure out what kind of json path I'd need. Is this even possible to do with JSON_VALUE?
EDIT: To clarify, the views and sections components can have static array indexes, so I can use views[0].sections[0] for them. Currently, this is all I have with my SQL query:
SELECT
*
FROM OPENJSON(#jsonInfo, '$.views[0].sections[0]')
You need to use OPENJSON to break out the inner array, then filter it with a WHERE and finally select the correct value with JSON_VALUE
SELECT
JSON_VALUE(components.value, '$.values[1]')
FROM OPENJSON (#jsonInfo, '$.views[0].sections[0].components') components
WHERE JSON_VALUE(components.value, '$.id') = '3'
I want to extract values from an JSON document with using the path operators.
For example I get all the product IDs included in the file via $..product_id.
But for getting the "id" when I use $..id I get an output for each id element, no matter on which level of the JSON the variable is.
For example in my output I get an row for the id "12345678" as well as for "11223344" which should not be because it is a subset of the first ID.
{
"next_offset": 20,
"records": [
{
"id": "12345678",
"date": "2020-02-14",
"product_id": "asdf1234",
"product_name": "Product_test^_1",
"template_link": {
"name": "aassddff",
"id": "11223344",
"_acl": {
"fields": [],
"_hash": "345thvz356b56v456b"
}
},
....
}
]
}
How can I set the path operator to only access the "id" fields of one specific level?
For the JSON shown in your question, use $.records.*.id.
here is an example of some JSON that I need to deal with:
{
"name": "John Smith",
"active": "yes",
"cpair": [
{
"title": "ADDRESS",
"charVal": "1234 Fulcrum lane"
},
{
"title": "phone",
"charVal": "555-7600"
}
]
}
So I'm using the evaluateJsonPath processor to add these values as attributes in my flowfile. thats easy for some. I can just set name equal to $.name and active to $.active. But lets say I need to give the attribute 'address' the value of "1234 Fulcrum lane". How do I assign that attribute the proper charVal value that matches up with the correct title?
according to Jayway JsonPath documentation
this should work:
$.cpair[?(#.title == 'ADDRESS')].charVal