json-schema-to-sql/dist/src/reference.js

Convert a JSON schema into SQL DDL (create table) statements.

function resolveReference(visitedTables, unresolvedReference) {
    const [, ...referencePath] = unresolvedReference.reference.split('/');
    const tablePath = referencePath.slice(0, -1);
    const referencedColumnName = referencePath.at(-1);
    const referencedTable = visitedTables.find((table) => table.name === tablePath.join('_'));
    if (!referencedTable) {
        return {
            resolvedReference: null,
            error: {
                path: [...unresolvedReference.schemaPath, unresolvedReference.name],
                message: `${unresolvedReference.reference} references unknown table "${tablePath}"`,
            },
        };
    }
    const referencedColumn = referencedTable.visitedColumns.find((column) => column.name === referencedColumnName);
    if (!referencedColumn) {
        return {
            resolvedReference: null,
            error: {
                path: [...unresolvedReference.schemaPath, unresolvedReference.name],
                message: `${unresolvedReference.reference} references unknown column "${referencedColumnName}" in table "${[tablePath].join('_')}"`,
            },
        };
    }
    if (referencedColumn.type === 'date' ||
        referencedColumn.type === 'datetime' ||
        referencedColumn.type === 'number') {
        return {
            resolvedReference: null,
            error: {
                path: [...unresolvedReference.schemaPath, unresolvedReference.name],
                message: `${unresolvedReference.reference} references disallowed "${referencedColumn.type}" type column "${referencedColumnName}" in table "${tablePath}"`,
            },
        };
    }
    return {
        resolvedReference: {
            name: unresolvedReference.name,
            type: referencedColumn.type,
            reference: {
                table: referencedTable.name,
                column: referencedColumn.name,
            },
            oneToMany: unresolvedReference.oneToMany,
        },
        error: null,
    };
}
export function resolveReferences(visitedTables) {
    const resolvedTables = [];
    const validationErrors = [];
    for (const visitedTable of visitedTables) {
        const resolvedTable = {
            ...visitedTable,
            resolvedReferences: [],
        };
        for (const unresolvedReference of visitedTable.unresolvedReferences) {
            const { resolvedReference, error } = resolveReference(visitedTables, unresolvedReference);
            if (error) {
                validationErrors.push(error);
            }
            else {
                resolvedTable.resolvedReferences.push(resolvedReference);
            }
        }
        resolvedTables.push(resolvedTable);
    }
    if (validationErrors.length > 0) {
        return { success: false, resolvedTables: null, errors: validationErrors };
    }
    return { success: true, resolvedTables, errors: null };
}
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