How to Convert String Array into Prisma Select Statement

Question

I want to select Prisma columns dynamically, I am getting this from the client:

['id', 'createdAt', 'updatedAt', 'Order.id', 'Order.Item.id', 'Order.Item.desc']

I want to change it to something like this:

{id: true, createdAt: true, updatedAt: true, Order: {select: {id: true, Item: {select: {id: true, desc: true}}}}

so that I can use it in the Prisma query like:

prisma.sales.findMany({where: {id: {_eq: 1}}, select: {id: true, createdAt: true, updatedAt: true, Order: {select: {id: true, Item: {select: {id: true, desc: true}}}}}})

Answer 1

You can build a simple recursive function to build object and populate the nested properties:

 const objPaths = ['id', 'createdAt', 'updatedAt', 'Order.id', 'Order.Item.id', 'Order.Item.desc']; function buildObject(paths) { const result = {}; for (const path of paths) { const pathParts = path.split("."); if (pathParts.length > 1) { populateNested(result, pathParts, 0); } else { result[path] = true; } } return result; } function populateNested(parent, paths, currPathIndex) { if (currPathIndex === paths.length - 1) { parent[paths[currPathIndex]] = true; } else { let currObj = {select: {}}; if (parent[paths[currPathIndex]]) { currObj = parent[paths[currPathIndex]]; } parent[paths[currPathIndex]] = currObj; populateNested(currObj.select, paths, currPathIndex + 1); } } console.log(JSON.stringify(buildObject(objPaths), null, 2));