Issues

This pull request fixes #1359.

Description

Currently, the ODataEnumSerializer and ODataEnumDeserializer fails to convert multi-value Flag enums to LowerCamelCase as specified in EnumMember attribute. However, this works with single-value Flag enums.

Example:

Consider the following Flag enum:

[Flags]
[DataContract(Name = "exampleEnum")]
public enum ExampleEnum
{
    [EnumMember(Value = "firstValue")]
    FirstValue = 1,

    [EnumMember(Value = "secondValue")]
    SecondValue = 2,

    [EnumMember(Value = "thirdValue")]
    ThirdValue = 4
}

With the default ODataEnumSerializer, a single-value Flag enum like ExampleEnum.FirstValue is correctly converted to ("firstValue"). However, a multi-value Flag enum like ExampleEnum.FirstValue | ExampleEnum.SecondValue is not converted to ("firstValue, secondValue") as expected. Instead, it remains in its original form as "FirstValue, SecondValue"

This change modifies both ODataEnumSerializer and ODataEnumDeserializer to correctly convert multi-value Flag enums to LowerCamelCase. This is to ensure that the serialization and deserialization of multi-value Flag enums are consistent with the single-value Flag enums.

With this change, the following are supported by default without having to write custom converters:

• GET odata/examples:

  {
   "@odata.context": "https://localhost:7085/odata/$metadata#Examples",
   "value": [
     {
       "id": 1,
       "name": "Example1",
       "ExampleEnum": "firstValue"
     },
     {
       "id": 2,
       "name": "Example2",
       "ExampleEnum": "firstValue, secondValue" // support write-to multi-value Flags enums to Lower Camel Case
     },
     ...
   ]
  }

• POST odata/examples:

  {
    "Id": 0,
    "Name": "John Doe Example",
    "ExampleEnum": "firstValue, thirdValue" // support read-in multi-value Flags enums in Lower Camel Case
  }

• PATCH odata/examples(1):

  {
      "ExampleEnum": "firstValue, thirdValue" // support read-in multi-value Flags enums in Lower Camel Case
  }

Checklist (Uncheck if it is not completed)

• Test cases added
• Build and test with one-click build and test script passed

Additional work necessary

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