fix(#4218): avoid duplicate injection on fields #5224
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…sponding injected constructor parameter is available
giulong
commented
Jul 13, 2025
| @@ -816,6 +816,9 @@ protected void addInjectables(DeserializationContext ctxt, | |||
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| for (Map.Entry<Object, AnnotatedMember> entry : raw.entrySet()) { | |||
| AnnotatedMember m = entry.getValue(); | |||
| if (m.isIgnoreInjection()) { | |||
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We avoid creating a redundant ValueInjector for fields whose injection was already performed via constructor properties.
src/main/java/com/fasterxml/jackson/databind/introspect/AnnotatedMember.java
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I like the concept, although would prefer not adding configuring state in |
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After a quite deep analysis on #4218, I ended up implementing what was also suggested in this comment.
This way, when there are both creator properties and fields with the same injection, we mark the annotated field to be ignored when creating the corresponding injectable.
We ignore fields instead of constructor properties considering that constructor injection happens before field injection, and users may need the injected value in the constructor to do any additional logic on their side.
This seems to solve #2678 as well.
Waiting for feedbacks and improvements