I have a function that queries data from an external api (making a power connector). I need one of my inputs for the api to be json text (could be nested json). However from the Power BI UI side, I can only pass in things like numbers, text, lists... I could write it as a JSON encoded string like this
MyLibrary.GetData("{""key"":{""key2"":""value""}}")
But this looks messy. I would like to write it natively like this for example (then convert it to json text in M language).
MyLibrary.GetData({"key":{"key2":"value"}})
How can I do this?
Figured it out. There is a record type like this [key=Value]. Value can be any type.
Related
I received a one digit as string format, for example, which look like 12.
What I want to do is to convert those strings into a json format and
write them to the text file in my local directory.
However, I didn't get the right solution except for those things that manually change the strings so that it looks like the json format. I think it is tedious and laborious tasks.
The completed json format will be shown as below.
{"temperature": 12}
Is there any libraries that achieve my issue?
Thanks.
Check out Gson. In particular, if you have a Java class with a single "temperature" field, then see this for how to convert to Json.
I just came across a JSON wannabe that decides to "improve" it by adding datatypes... of course, the syntax makes it nearly impossible to google.
a:4:{
s:3:"cmd";
s:4:"save";
s:5:"token";
s:22:"5a7be6ad267d1599347886";
}
Full data is... much larger...
The first letter seems to be a for array, s for string, then the quantity of data (# of array items or length of string), then the actual piece of data.
With this type of syntax, I currently can't Google meaningful results. Does anyone recognize what god-forsaken language or framework this is from?
Note: some genius decided to stuff this data as a single field inside a database, and it included critical fields that I need to perform aggregate functions on. The rest I can handle if I can get a way to parse this data without resorting to ugly serial processing.
If this can be parsed using MSSQL 2008 that results in a view, I'll throw in a bounty...
I would parse it with a UDF written in .NET - https://learn.microsoft.com/en-us/sql/relational-databases/clr-integration-database-objects-user-defined-functions/clr-user-defined-functions
You can either write a custom aggregate function to parse and calculate these nutty fields, or a scalar value function that returns the field as JSON.
I'd probably opt for the latter in the name of separation of concerns.
Just to check, the default JSON view which changes python objects to JSON seems to include whitespace between the variables, i.e.
"field": [[110468, "Octopus_vulgaris", "common octopus"...
rather than
"field":[[110468,"Octopus_vulgaris","common octopus"...
Is that right? If so, is there an easy way to output the JSON without the extra spaces, and is this for any reason (other than readability) a bad idea.
I'm trying to make some API calls return the fastest and most concise JSON representation, so any other tips gratefully accepted. For example, I see the view calls from gluon.serializers import json - does that get re-imported every time the view is used, or is python clever enough to use it once-only. I'm hoping the latter.
The generic.json view calls gluon.serializers.json, which ultimately calls json.dumps from the Python standard library. By default, json.dumps inserts spaces after separators. If you want no spaces, you will not be able to use the generic.json view as is. You can instead do:
import json
output = json.dumps(input, separators=(',', ':'))
If input includes some data that are not JSON serializable and you want to take advantage of the special data type conversions implemented in gluon.serializers.json (i.e., datetime objects and various web2py specific objects), you can do the following:
import json
from gluon.serializers import custom_json
output = json.dumps(input, separators=(',', ':'), default=custom_json)
Using the above, you can either edit the generic.json view, create your own custom JSON view, or simply return the JSON directly from the controller.
Also, no need to worry about re-importing modules in Python -- the interpreter only loads the module once.
What is more correct? Say that JSON is a data structure or a data format?
It's almost certainly ambiguous and depends on your interpration of the words.
The way I see it:
A datastructure, in conventional Comp Sci / Programming i.e. array, queue, binary tree usually has a specific purpose. Json can be pretty much be used for anything, hence why it's a data-format. But both definitions make sense
In my opinion both is correct.
JSON is also a data format (.json) and also a data strucuture which you can use for instance in Java etc.
But more correct is data strucutre.
JSON (canonically pronounced /ˈdʒeɪsən/ jay-sən;[1] sometimes
JavaScript Object Notation) is an open-standard format that uses
human-readable text to transmit data objects consisting of
attribute–value pairs. It is the most common data format used for
asynchronous browser/server communication (AJAJ), largely replacing
XML which is used by AJAX.
Source: Wikipedia
If I wanted to save a contact form submission to the database, how can I insert the form scope in as the submission? It's been some time since I used Coldfusion.
The contact forms vary depending on what part of the site it was submitted from, so it needs to scale and handle a form with 5 fields or one with 10 fields. I just want to store the data in a blob table.
Most space efficient way and least complicated to turn back into original shape is using serializeJSON. After that, you can use something like key:value|key:value, or XML representation of your struct.
Cfwddx is also an alternative.
I don't know that there is a way to store a native structure into a database, but have you thought about using JSON to represent your object as key-pair values and then parsing it into a native structure after retrieving it from the database?
There are tags/functions out there that will help you with the encoding and decoding into JSON:
cfJSON Tag
CF8 Serialize JSON
CF8 Deserialize JSON
If you can't normalize the form fields into proper table(s), you can try storing them:
in XML (SQL Server supports XML pretty well), or
in JSON (in a plain varchar field), or
ObjectLoad() & ObjectSave() (CF9 only) to store as blob.
IIRC there are ways to get object load/save functionality in pre-CF9 by tapping into Java. http://www.riaforge.org/ or http://cflib.org/ might have it.