I exported a json file from my firebase but I can't seem to find a tool that can generate a class diagram or UML from a json file. Can anyone help me? It'll be a great help.
I don't think this is possible.
An instance of a JSON document describes what values are attached to what key's. UML class diagram is meant to show structure. A UML diagram could use a class to represent a JSON object. Using the JSON keys as attributes (with nested information as a class that it has an instance of). However Going this way would still make it impossible to define the type of the information the attribute holds. For example you might have a key X that holds the number 5. Without knowing this is a number no tool can auto generate a UML diagram for you. As the tool would need to know the type of the data in advance.
Related
As far as I understand Pydantic and Json Schemas provide similar functionality - both can be used for validating data outputs.
I am interested to understand the pros and cons of using each one. A few questions I am interested in:
Are there any differences in accruacy between them?
Which one is faster to implement in terms of development time?
Is there any functionality difference between the two? i.e. features one supports, that the other doesn't?
These are only examples of questions I am thinking about, I would love to know more about the pros and cons also.
WHile both Pydantic and Json Schema are used to verify data adheres to a certain format they're serve different use-cases:
Json Schema: a tool for defining JSON structures independent of any implementation or programming language.
Pydantic: a python specific tool for validating input data against a pydantic specific definition
You can find many implementations of Json Schema validator in many languages those are the tools that you might want to check out in a 1:1 comparison to pydantic. However, pydantic understands Json Schema: you can create pydantic code from Json Schema and also export a pydantic definition to Json Schema. They should be equivalent from a functional perspective. You can find a type mapping in the pedantic docs.
So, which should you use? Your use-case is important but most likely its not either/or. If you're python-only and prefer to define your schema in python directly definitely go for pydantic. If you need to exchange the schemas across languages or want to handle schemas generated somewhere else, you can add Json Schema on top and pydantic will be able to handle it.
Do I need to write the enums for the TwinCAT data types? Or they exist somewhere and I just can't find them?
Example: there is a data type called MC_HomingMode, which defines how to perform homing. I want to control it VIA ADS, so I need an enum for it. Couldn't find it.
Thanks
Well it apears there is no such thing. In my case, the TwinCAT types I needed, I made them in C# by my self.
I am newbie for Flutter. I have just created sample application using JSON Parsing.
Before I have done it using manual classes but currently I have changed my code to json_serializable and you can check the difference here.
It is okay for one or two model class which you need to change with fromJson and toJson methods but What to do when our project has 50+ model classes.
Any idea to write all the classes with easy way?
Do let me know If you need other information. Thank you.
I don't think there is an automated way built to do this. You are going to have to do the changes manually.
To make it easier, you can create a snippet in vscode to generate the new toJson and fromJson methods
How to add custom code snippets in VSCode?
But as the variable names are different from the JSON keys, you will need to add that by yourself.
Does anyone know a good way to to draw the exact structure of input data for a method? In my case I have to specify the correct input data for a server application. The server gets an http post with data. Because this data is a very complex json data structure, I want to draw this, so next developer can easily check the drawing and is able to understand, what data is needed for the http post. It would be nice if I can also draw http headers mark data as mandatory or nice to have.
I dont need a data flow diagramm or sth. like that. What I need is a drawing, how to build a valid json for the server method.
Please if anyone have an idea, just answer or comment this question, even if you just have ideas for buzz words, I can google myself.
In order to describe data structure consider (1) using the UML class diagram with multiplicities and ownership and "named association ends". Kirill Fakhroutdinov's examples uml-diagrams.org: Online Shopping and uml-diagrams.org: Sentinel HASP Licensing Domain illustrate what your drawing might look like.
As you need to specifically describe json structure then (2) Google: "json schema" to see how others approached the same problem.
Personally, besides providing the UML diagram I'd (3) consider writing a TypeScript definition file which actually can describe json structure including simple types, nested structures, optional parts etc. and moreover the next developer can validate examples of data structures (unit tests) against the definition by writing a simple TypeScript script and trying to compile it
I'm writing the documentation for my project.
I need to represent the JSON nested schema, but I don't want include the raw-code.
Is there a standard way to represent JSON data schema as graphs?
There is no a standard way, and I doubt it will ever exist. Due to its graph nature, you might leverage any representation of graphs.
For json-schema you might have a look to any of the following libraries: matic, docson or jsonary.