spring-projects / spring-projects/spring-hateoas
Empty HAL-Forms options inline attribute should be serialized
@odrotbohm is already working on this.
Since Apr 1, 2026.
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Description
Currently, when HalFormsOptions.Inline#getInline is empty, the JSON inline attribute is excluded from the representation. This is because of:
If we take a look at HAL-FORMS specification, we can read what follows:
If the inline attribute is missing or unparseable and the link (see link) attribute is missing or unparseable, then the options element SHOULD be ignored.
Therefore, IMO, from the spec POV, inline has 3 states:
- missing
- empty
- non empty
Spring HATEOAS current behavior reduces this to 2 states:
- missing
- non empty
I think Spring HATEOAS should fix this to correctly represent the 3 states of the specification.
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