Function validateRelation

packages/core/fumadb/src/schema/validate.ts:58–89

(relation: AnyRelation)

  }

  function validateRelation(relation: AnyRelation) {
    if (!relation.implied && !relation.foreignKey) {
      throw new Error(
        `[${relation.name}] You must define foreign key for explicit relations due the limitations of Prisma.`
      );
    }

    // ignore implied
    if (relation.implied) return;

    if (
      relation.implying?.type === "one" &&
      !isCompositeColumnsUnique(
        relation.referencer,
        relation.on.map(([left]) => relation.referencer.columns[left])
      )
    ) {
      throw new Error(
        `[${relation.name}] one-to-one relations require both sides to be unique or primary key.`
      );
    }

    if (
      !isCompositeColumnsUnique(
        relation.table,
        relation.on.map(([, right]) => relation.table.columns[right])
      )
    )
      throw new Error(
        `[${relation.name}] For any explicit relations, the referenced columns must be unique or primary key.`
      );
  }

  for (const table of tables) {
    for (const foreignKey of table.foreignKeys) {