PRACTICAL FIELD GUIDE
Create parent records before dependent records
A foreign-key relationship makes the existence of a referenced parent part of data validity. The frontend needs the actual parent's key before it creates a dependent row.
MCPBackend editorial team · · Examples are illustrative
Put it into practice
- Verify which child column references which parent table and key.
- Create or retrieve the parent using an authorized path, then use its returned identifier in the child request.
- Handle a constraint failure without silently creating an unrelated replacement parent.
What this looks like
ILLUSTRATIVE EXAMPLE
An order item refers to an order ID that was never saved because an earlier request failed. The child insert should not be treated as an independent success.
A boundary to keep clear
A foreign key checks the relationship, not whether the caller is allowed to act on the parent. Review authorization separately.
MCPBackend context
MCPBackend stores each project's data in SQLite and exposes supported tables through generated REST endpoints. Use the schema tools and dashboard for supported changes. The design examples here are patterns to adapt, not claims that the API exposes every SQLite feature or arbitrary SQL.
Take the next step
Inspect the current project contract, try the change with disposable data, and verify the result through the same credentials your app will use. Record the expected response and one denied-access case before release.
Sources and further reading
These references explain the underlying protocols and design principles. For supported MCPBackend operations and exact request shapes, inspect your project’s generated API contract.