Fix field type inference when FieldDescriptorProto.type is unset#1369
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jakewisse wants to merge 1 commit intobufbuild:mainfrom
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Fix field type inference when FieldDescriptorProto.type is unset#1369jakewisse wants to merge 1 commit intobufbuild:mainfrom
jakewisse wants to merge 1 commit intobufbuild:mainfrom
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Some protobuf tooling (e.g. Confluent Schema Registry) omits the `type` field from FieldDescriptorProto when `type_name` is set. According to [`descriptor.proto`][0], this is valid : "If type_name is set, this need not be set." Because descriptor.proto is proto2, protobuf-es places the default value (TYPE_DOUBLE = 1) on the prototype. When `type` is absent from the wire data it is never set as an own property, and `proto.type` inherits the prototype default, causing message and enum fields to be misclassified as scalar. This resolves the field type from the registry via `type_name` when `type` is not explicitly set. From there, thread the resolved type through `getFieldPresence()`, `isPackedField()`, and `isDelimitedEncoding()` to avoid the same prototype fallback in those functions. -- [0]: https://github.com/protocolbuffers/protobuf/blob/c223b2e1fa96feac05f275853e64a87993d557a2/src/google/protobuf/descriptor.proto#L295-L296
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Some protobuf tooling (e.g. Confluent Schema Registry) omits the
typefield from FieldDescriptorProto whentype_nameis set. According todescriptor.proto, this is valid : "If type_name is set, this need not be set."Because descriptor.proto is proto2, protobuf-es places the default value (TYPE_DOUBLE = 1) on the prototype. When
typeis absent from the wire data it is never set as an own property, andproto.typeinherits the prototype default, causing message and enum fields to be misclassified as scalar.This resolves the field type from the registry via
type_namewhentypeis not explicitly set. From there, we thread the resolved type throughgetFieldPresence(),isPackedField(), andisDelimitedEncoding()to avoid the same prototype fallback in those functions.Fixes #1368.