typeserializer | :tada: Awesome serializer / deserializer for javascript objects | Runtime Evironment library
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kandi X-RAY | typeserializer Summary
Serializer / deserializer of javascript objects.
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QUESTION
I develop a AWS Lambda in Python. I read data in dynamoDB but after I want return json data to APIGateway.
...ANSWER
Answered 2021-Sep-23 at 09:33It is because JSON object must only contain specific types such as list, dict, str, int, float, etc. Thus for the types that are not supported such as Decimal, datetime, etc., we should explicitly define how should they be parsed by defining a custom serializer. For example, should Decimal('2015') be a string "Decimal(2015)" or just the number part "2015" or should it be an int 2015 or float 2015.0 or something else.
Here is a solution that also works recursively if the Decimal object is in an inner nest. We will get the string value of the number e.g. "2015" (I chose str type because returning float might be inconsistent depending on the tech stack e.g. 1.2 might be interpreted as 1.20000001). This will be implemented via the default and cls argument to json.dumps() which as documented:
If specified, default should be a function that gets called for objects that can’t otherwise be serialized. It should return a JSON encodable version of the object or raise a TypeError. If not specified, TypeError is raised.
QUESTION
I've got following setup: C#, ServiceStack, MariaDB, POCOs with objects and structs, JSON.
The main question is: how to use ServiceStack to store POCOs to MariaDB having complex types (objects and structs) blobbed as JSON and still have working de/serialization of the same POCOs? All of these single tasks are supported, but I had problems when all put together mainly because of structs.
... finally during writing this I found some solution and it may look like I answered my own question, but I still would like to know the answer from more skilled people, because the solution I found is a little bit complicated, I think. Details and two subquestions arise later in the context.
Sorry for the length and for possible misinformation caused by my limited knowledge.
Simple example. This is the final working one I ended with. At the beginning there were no SomeStruct.ToString()/Parse() methods and no JsConfig settings.
ANSWER
Answered 2021-Apr-02 at 09:19ServiceStack treats structs like a single scalar value type, just like most of the core BCL Value Types (e.g. TimeSpan, DateTime, etc). Overloading the Parse() and ToString() methods and Struct's Constructor let you control the serialization/deserialization of custom structs.
Docs have been corrected. Structs use
Parsewhilst classes useParseJson/ParseJsv
If you want to serialize a models properties I'd suggest you use a class instead as the behavior you're looking for is that of a POCO DTO.
If you want to have structs serailized as DTOs in your RDBMS an alternative you can try is to just use JSON.NET for the complex type serialization, e.g:
QUESTION
I am using Camunda workflow automatition and I would like to implement JSON serialization.
There is an example project here: https://github.com/camunda/camunda-bpm-examples/tree/master/spin/dataformat-configuration-global
I did everything accordingly, but Jackson cannot serialize the MxSwiftMessage object (which you can find here: https://github.com/prowide/prowide-iso20022/blob/develop/iso20022-core/src/main/java/com/prowidesoftware/swift/model/MxSwiftMessage.java) by default.
So I had to write a custom JsonSerializer and JsonDeserializer.
My problem is that in the Deserializer I always get a null string.
Here is the code:
MxSwiftMessageJsonSerializer
...ANSWER
Answered 2021-Mar-24 at 15:43I finally found a solution which works for me. The magic happens in the serializeWithType method. It has to write the data as an Array value.
I also changed the underlying data structure to json object instead of the pure string to store the xml representation of the MxSwiftMessage object.
This is the code:
MxSwiftMessageJsonSerializer
QUESTION
I have to work ListAPIView view, via which I can filter via django-filter values. But I need to add an object in JSON (because AMP HTML needs that) and when I add this, It will break this filtering.
When I use this view, filtering is works great:
...ANSWER
Answered 2020-Dec-01 at 18:22This code is taken from django source code:
QUESTION
I am using DRF and I'm trying to create an object which has several foreign keys as well as related objects that will need creating in the process.
Here's what a reduced version of my models looks like:
...ANSWER
Answered 2020-Jun-09 at 14:57So in the end I solved this by using RelatedField instead of separate serializers for every foreign key, with the exception of the nested EventSerializer that is really required to write nested Event objects.
Here's the RaceSerializer:
QUESTION
I had a plan to connect to a JSON-based API using ServceStack's Routing features for C#. It seems that I get a '422 Unprocessable Entity' when attempting to do so when, in reality I'm supposed to be getting a JSON response. This error message is interesting though, since it repeats itself multiple times over (8 times exact) with the message Could not parse Error ResponseStatus ErrorResponse System.IndexOutOfRangeException: Index was outside the bounds of the array. Full stack trace below.
I've tried many configurations, and there is one that 'works' but removes one of the key needs of the way this route is set up. In this project, I use ICacheClient to save a session key for 5 minutes, so I don't always need to call the API every time I need it. Since ServiceStack uses injection to set my instance of ICacheClient, it must be public. However, if it is public I get that 422 error, but if it isn't public I get a NullPointer because it's reference cannot be set by ServiceStack.
Here's my current setup:
AppHost.cs
...ANSWER
Answered 2020-Jun-05 at 16:11The problem was caused by the following issue: - The 3rd-party provider automatically adds "Bearer" before your token.
This snippet:
QUESTION
I am deserializing protocol buffer data using Protobuf-NET and am dealing with multiple Proto files that are identical but have slightly different extensions. Basically each Proto feed is 99% identical and then has 1 or 2 fields different from each other provided as extensions for each. So I ended up with multiple Proto classes that are 99% identical.
Logically I want to add inheritance to generated C# proto files in order to avoid 99% of redundant code parsing each feed. The problem is that I am getting the following error upon deserialization:
...ANSWER
Answered 2020-Apr-23 at 08:45The fundamental problem here is that there is a collision:
- protobuf-net implements inheritance in protobuf (which does not have inheritance) by modelling it as multiple messages (one per type) and a
oneofat each decision point - in protobuf, each message could have extensions
- but right now, the implementation of extensions in protobuf-net is per object
- so it would be unclear to which message you want to apply the extension
I have thought about extending the API to make it track the extensions against the logical type (which would map to the message), but this is complex and would take me time to add.
Most other protobuf tools do not support inheritance at all, so I doubt you'd find that a viable workaround.
So: that's why it isn't there; that doesn't really.givr you a workaround, sorry. The only "fix" here is "take the time to implement the complexity of per-type extension storage and retrieval"
QUESTION
i a newi'm trying to understand how serializers from django works when we have multiple fields from multiple tables, and this fields are related with FK.
My Goal is retrieve all informations in one Json.
I create a scenario ti post here,
My Models:
...ANSWER
Answered 2020-Feb-10 at 14:38You don't need to define serializers for each model, instead you can use depth property to serialize nested objects with django rest framework like this:
QUESTION
I am using a valid license key. But I keep getting this error:
...ANSWER
Answered 2020-Feb-06 at 12:42I believe the version of ServiceStack you are using was built with a different version of System.Runtime.CompilerServices.Unsafe than what you are using in your Test project and because bindingredirect are not working in this context. See Does redirecting assembly binding work for unit testing with a test runner?
As a workaround, you can try changing System.Runtime.CompilerServices.Unsafe in Nuget Package Manager to 4.5.2.
This version matches the missing assembly, Version=4.0.4.1.
Edit: If you are using NUnit 3 in your NUnit build step, you can then specify "Path to application configuration file: " to point to your app.config. This should solve the root problem and let you use the most current version of your Nuget packages (since the correct bindingRedirects will then be applied).
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Install typeserializer
You also need to install reflect-metadata shim:
Import reflect-metadata in a global place of your app (for ex. index.ts):
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