I am using Application Insights Log-Explorer query window to visualize the below query.
Inside the field customDimensions.RemotePC I am string a json payload.
When I try to index the stored json via propery-indexing, i get the value as null. I tried to access it as array that turns null as well.
Could you please help me to access the FirstName property in below diagram.
Try this:
| extend todynamic(tostring(rpc)).FirstName
I believe that the issue is that rpc is string (although it looks as json). Thus you need to "cast" it to dynamic. You first need to tell the compiler though that this is a string value.
Related
the way to determine a request parameter is null in spring
If you're talking about query or form parameters, then these cannot take value null. They are sent as strings; any conversion (e.g. to int) is done by the framework or your own application. So if a query parameter is sent in as ?var=null, then your applications gets 'null' - a string of length 4 containing the word null. So, if your application receives a null, then the query / form parameter was not sent.
It's a different story when you're talking about properties in JSON. If the type is simply String, Integer, etc., then you cannot see the difference between not-present and present as null. You can try using Optional<String> etc., but I haven't tried that myself. For Jackson you can find more information at https://www.baeldung.com/jackson-optional.
to make sure request parameter is not null and is always present you can use
#RequestParam(required = true)
This will make sure parameter is always passed
I'm hoping to be able to analyze structured data stored in a custom dimension of a custom telemetry event emitted to application insights, and getting some weird behavior. It seems like the JSON can't be parsed normally, but if I pass it through strcat it is able to parse the json just fine.
customEvents
| where name == "PbConfigFilterComponentSaved"
| take 1
| project
jsonType=gettype(customDimensions.Json),
parsedType=gettype(parse_json(customDimensions.Json)),
strcatType=gettype(strcat('', customDimensions.Json)),
strcatParsedType=gettype(parse_json(strcat('', customDimensions.Json)))
Result:
jsonType: string
parsedType: string
strcatType: string
strcatParsedType: dictionary
Is there a better approach to getting parse_json to work on this kind of value?
Update
In case it's in any way relevant, here's the value of customDimensions.Json:
{"filterComponentKey":"CatalystAgeRange","typeKey":"TemporalConstraint","uiConfig":{"name":"Age","displayMode":"Age"},"config":{"dateSelector":"pat.BirthDTS"},"disabledForScenes":false,"disabledForFilters":false}
Could you please demonstrate a sample record that isn't parsed correctly?
Speculating (before seeing the data): Have you verified the final paragraph here doesn't apply to your case?
It is somewhat common to have a JSON string describing a property bag in which one of the "slots" is another JSON string. […] In such cases, it is not only necessary to invoke parse_json twice, but also to make sure that in the second call, tostring will be used. Otherwise, the second call to parse_json will simply pass-on the input to the output as-is, because its declared type is dynamic.
The type of customDimensions is dynamic and so accessing a property like customDimensions.json from it will return a string typed as dynamic.
You have to explicitly cast it as string and then parse it:
todynamic(tostring(customDimensions.json)).property
I think the "Notes" section in the documentation is exactly the issue, as mentioned by Yoni L. in the previous answer.
I'm using the .NET API of CosmosDB and I'm getting a hard time trying to figure out how to get the raw result of a CosmosDB query prior to it getting deserialized into a class. Browsing the documentation, all examples I find cast the results to an specific class or to a dynamic. That is:
//This returns a Document, wich actually is a dynamic...
client.ReadDocumentAsync(...)
//This returns an object of type MyClass, wich I supose is casted internally by the API
client.ReadDocumentAsync<MyClass>(...)
What I want to do is to get the original raw JSON payload of the result to inspect it without the overhead of deserializing it to anything else.
Does anybody know if it's possible to get the raw result with the .NET api? If so, how?
In other cases, I need to use the result as an ExpandoObject to treat it dynamically, but I find that the "dynamic" results given by the api are not "expandables" so I'm forced to serialize them and then deserialize again in a recursive form into an ExpandoObject. Furthermore, the result is polluted with _rid, Etag, etc. properties that I don't need on my object. It's quite anoying.
I think it's an unnecesary overhead to serialize and then deserialize again, so maybe the optimus way would be to get the raw JSON result and write a method to deserialize directly to Expando.
Or maybe I'm loosing any point and there's an API to get the results as Expandos. Does anybody know it?
Check out this question that I had earlier:
Converting arbitrary json response to list of "things"
Altough I didn't named it, the API in question was actually DocumentDb, so I think you'll be able to use that code.
Seen some bad advice here, but it is built into the SDK natively.
Document doc = cosmosClient.ReadDocumentAsync(yourDocLink);
string json = doc.ToString();
I have made a gridx grid that uses a JsonRest Memory store from the dojo framework
http://dojotoolkit.org/reference-guide/1.10/dojo/store/JsonRest.html
the issue is I do not know how to pull out the sort parameter from the query string.
The url being formatted from the JsonRest call is
/admin/sales?sort(+DealershipName)
using the following statement gives me a null error
String sort = Request.QueryString["sort"].ToString();
Looking at the debugger I see the following (I need more rep to post images :( )
ok I can see that the following variables hold this value.
Request.QueryString = {sort(+DealershipName)}
type : System.Collections.Specialized.NameValueCollection
{System.Web.HttpValueCollection}
but the array is null.
I'm thinking I can do two thing. Parse the string myself or overload the dojo JsonRest Memory store. Parsing the string seems easier but if anyone has any idea or knows any libraries that can help me out. I would greatly appreciate it.
dojo/store/JsonRest has a sortParam property that you can set to the name of a standard query parameter to use instead of sort(...) (which it uses by default to avoid colliding with any standard query parameters).
For example, adding sortParam: 'sort' to the properties passed to the JsonRest constructor will result in the query string including sort=+DealershipName instead.
http://dojotoolkit.org/reference-guide/1.10/dojo/store/JsonRest.html#sorting
If the + also presents a problem, you can also override ascendingPrefix to be an empty string (''). Note that descending sort will still be indicated by a leading - (controllable via descendingPrefix).
I am receiving xml from a webservice call that contains a nil="true":
<cacheEntry>
<systemFK nil="true"/>
</cacheEntry>
I used the Flex DataService (webservice) wizard to create the service objects for the cacheEntry component. This object will be serialized later on a different webservice call and stored in a database.
I set a breakpoint on the set SystemFK method in the service object. It appears that the value passed in was an empty string!
Allowing this value to be an empty string will cause problems in the webservice implementation in Java on the other side. Since the database value was null it is expecting a null in return, If I avoid setting this value, the serviceObject should send back a null which will make the database happy.
My question is: How can I detect that a nil = true is present in the XML in order to avoid setting this value?
For some reason the ActionScript XML parsers don't know about Booleans. Without seeing the code that got generated for you, my guess is that somehow you're getting the string "true", instead of true, and that's what's causing your problem.
Make changes to the accessors to act as if #nil comes from the XML as a string, and then convert to Boolean manually.