Support Multitenant Services Without Requiring MTX Sidecar Setup #218
Description
Is your feature request related to a problem? Please describe.
Yes. The current architecture of the @cap-js/attachments plug-in requires a CAP mtx/sidecar setup to manage tenant subscription and model provisioning in multitenant scenarios. However, this requirement is not technically necessary for Node.js-based services, as the runtime already aligns with what the @sap/cds-mtxs library expects.
Describe the solution you'd like
We’d like the plug-in to support multitenant services without requiring an MTX sidecar. Specifically:
- Allow the plug-in to register its handlers in the main service runtime, not just in the sidecar.
- Introduce a configuration flag (e.g., in
.cdsrc.json) to enable this compatibility explicitly.
This would simplify the architecture and make the plug-in more flexible and compatible with modern deployment strategies.
Describe alternatives you've considered
- Using the MTX sidecar as required today, but this introduces complexity
- Attempting to patch the plug-in to bypass the sidecar check (e.g., ), but this is not maintainable long-term.
Line 222 in 4a1ec2d
Additional context
- The current check for sidecar usage appears to be based on a profile flag, not a hard technical limitation.
- A related feature request has been created for the underlying MTXS library to support batch multi-tenant operations:
[cds-mtxs] Support Batch Multi-Tenant Operations in CAP MTX Endpoints. - Documentation reference for DWC CF task behavior:
https://pages.github.tools.sap/deploy-with-confidence/solar-system/how-to-guides/application-development/development/nodejs_cap#cds-database-setup=multitenancy--using-euporie-for-onboarding-offboarding-and-upgrading-tenants-databases
Have you already checked existing issues before creating a feature request?
Yes.
Customer Info
Company: SAP