elsa-workflows
Fix MongoDB serialization exception for FlowScope backward compatibility
Problem
MongoDB serialization fails when upgrading from Elsa 3.3.5 to 3.4.0 because the FlowScope class structure changed between versions. The old version had an OwnerActivityId property that was removed in 3.4.0, causing MongoDB to throw serialization exceptions when trying to deserialize existing workflow instances:
System.FormatException: Element 'OwnerActivityId' does not match any field or property of class Elsa.Workflows.Activities.Flowchart.Models.FlowScope.
Solution
Added the missing OwnerActivityId property back to the FlowScope class with appropriate attributes to maintain backward compatibility:
[Obsolete("This property is maintained for backward compatibility only. Do not use in new code.")]
[JsonIgnore]
public string? OwnerActivityId { get; set; }
This approach:
- ✅ Allows MongoDB to successfully deserialize old workflow instances
- ✅ Prevents the property from appearing in JSON serialization (
[JsonIgnore]) - ✅ Discourages use in new code (
[Obsolete]) - ✅ Follows existing patterns in the codebase (similar to
ObsoleteConnection) - ✅ Requires minimal changes (8 lines added)
Testing
Added comprehensive unit tests to verify:
- The property exists and can be set/get for backward compatibility
- It's properly ignored in JSON serialization
- FlowScope can still be deserialized without the property
Fixes #6729.
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