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

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

import { generateSQL } from './generator';
import { resolveReferences } from './reference';
import { ajvValidate, zodParse } from './validator';
import { visitTable } from './visitor';
export function generateSQLFromJSONSchema(schema, dialect = 'pg') {
    const isAjvValid = ajvValidate(schema);
    if (!isAjvValid) {
        return {
            queries: null,
            errors: [
                {
                    path: ['#'],
                    message: 'Invalid JSON Schema syntax',
                },
            ],
        };
    }
    const parseResult = zodParse(schema);
    if (!parseResult.success) {
        return {
            queries: null,
            errors: parseResult.error.issues.map((issue) => ({
                path: issue.path,
                message: issue.message,
            })),
        };
    }
    const visitedTables = [];
    for (const [tableName, table] of Object.entries(parseResult.data.properties)) {
        visitTable(visitedTables, tableName, table, [], ['properties']);
    }
    const resolutionResult = resolveReferences(visitedTables);
    if (!resolutionResult.success) {
        return {
            queries: null,
            errors: resolutionResult.errors,
        };
    }
    const queries = generateSQL(resolutionResult.resolvedTables, dialect);
    return { queries, errors: null };
}
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