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

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

function visitColumn(parent, visitedTables, visitedTable, columnName, column, path = [], schemaPath = [], oneToMany = false) {
    if ('$ref' in column) {
        visitedTable.unresolvedReferences.push({
            name: columnName,
            reference: column.$ref,
            schemaPath,
            oneToMany,
        });
    }
    const parentPrimaryKeyRef = parent['x-primaryKey']
        ? {
            [[...path, parent['x-primaryKey']].join('_')]: {
                $ref: ['#', ...path, parent['x-primaryKey']].join('/'),
            },
        }
        : {
            [[...path, 'id'].join('_')]: {
                $ref: ['#', ...path, 'id'].join('/'),
            },
        };
    if ('type' in column) {
        if (column.type === 'object') {
            visitTable(visitedTables, columnName, {
                ...column,
                properties: {
                    ...column.properties,
                    ...parentPrimaryKeyRef,
                },
            }, path, schemaPath);
        }
        else if (column.type === 'array') {
            if ('type' in column.items) {
                if (column.items.type === 'object') {
                    visitTable(visitedTables, columnName, {
                        ...column.items,
                        properties: {
                            ...column.items.properties,
                            ...parentPrimaryKeyRef,
                        },
                    }, path, schemaPath, true);
                }
                else {
                    visitTable(visitedTables, columnName, {
                        type: 'object',
                        properties: {
                            value: column.items,
                            ...parentPrimaryKeyRef,
                        },
                    }, path, schemaPath, true);
                }
            }
        }
        else {
            if ('format' in column && column.format) {
                visitedTable.visitedColumns.push({
                    name: columnName,
                    ...column,
                    type: column.format,
                });
            }
            else {
                visitedTable.visitedColumns.push({
                    name: columnName,
                    ...column,
                });
            }
        }
    }
}
export function visitTable(visitedTables, tableName, table, path = [], schemaPath = [], fromArray = false) {
    const visitedTable = {
        name: [...path, tableName].join('_'),
        required: table.required,
        primaryKey: table['x-primaryKey'],
        visitedColumns: [],
        unresolvedReferences: [],
    };
    for (const [columnName, column] of Object.entries(table.properties)) {
        visitColumn(table, visitedTables, visitedTable, columnName, column, [...path, tableName], [...schemaPath, tableName, ...(fromArray ? ['items'] : []), 'properties'], fromArray);
    }
    visitedTables.push(visitedTable);
}
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