Prisma•4d ago

Validate Model

Problematic I would like to use Prisma.validator (or something else provided by Prisma) in order to validate a model Context

import { Prisma, Model1, Model2, Model3 } from "@prisma/client";
import { prisma } from "@/libraries/prisma";

type Multiple = Model1 | Model2 | Model3;

const search = async (query: string): Promise<Multiple[]> => {
  const model1 = await prisma.model1.findMany({ where: { name: { contains: query } } });
  const model2 = await prisma.model2.findMany({ where: { name: { contains: query } } });
  const model3 = await prisma.model3.findMany({ where: { name: { contains: query } } });

  return [...model1, ...model2, ...model3];
}

const displayData = (model: Multiple) => {
  // How can i use the validator there (or something else) to validate the type of my model?
  if (model Prisma.validator) return "model1";
  if (model Prisma.validator) return "model2";
  if (model Prisma.validator) return "model3";
}

const response = await search("hello world");

const data = displayData(response);
// do something with data

import { Prisma, Model1, Model2, Model3 } from "@prisma/client";
import { prisma } from "@/libraries/prisma";

type Multiple = Model1 | Model2 | Model3;

const search = async (query: string): Promise<Multiple[]> => {
  const model1 = await prisma.model1.findMany({ where: { name: { contains: query } } });
  const model2 = await prisma.model2.findMany({ where: { name: { contains: query } } });
  const model3 = await prisma.model3.findMany({ where: { name: { contains: query } } });

  return [...model1, ...model2, ...model3];
}

const displayData = (model: Multiple) => {
  // How can i use the validator there (or something else) to validate the type of my model?
  if (model Prisma.validator) return "model1";
  if (model Prisma.validator) return "model2";
  if (model Prisma.validator) return "model3";
}

const response = await search("hello world");

const data = displayData(response);
// do something with data

Solutions I know i can override the Model in order to pass the name of the model but would really like to make it the cleanest possible and use only Prisma. I also know you can create type guard functions using the uniques fields of my model but same thing not as clean as using a Prisma function. ex:

const isModel1 = (model: Multiple): model is Model1 => {
  return (model as Model1).model1UniqueField !== undefined; // Replace with a real field that exists only in Model1
}

const isModel1 = (model: Multiple): model is Model1 => {
  return (model as Model1).model1UniqueField !== undefined; // Replace with a real field that exists only in Model1
}

Resources - https://github.com/prisma/prisma/issues/3528 Thank you for your time if you help me with this :prismasmile:

Solution:

Finally created a function that answers this question in case anyone needs it ```ts export type GetModel<T extends Prisma.ModelName> = Exclude< Awaited<ReturnType<PrismaClient[Uncapitalize<T>]["findUnique"]>>, null...

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1 Reply

Solution

Arky•20h ago

Finally created a function that answers this question in case anyone needs it

export type GetModel<T extends Prisma.ModelName> = Exclude<
  Awaited<ReturnType<PrismaClient[Uncapitalize<T>]["findUnique"]>>,
  null
>;

export const validateModel = <T extends Prisma.ModelName>(
  model: T,
  data: GetModel<Prisma.ModelName>
): data is GetModel<T> => {
  const prismaModelEnum = Prisma[`${model}ScalarFieldEnum`];
  return Object.keys(prismaModelEnum)
    .map((v) => v in data)
    .every((v) => v);
};

export type GetModel<T extends Prisma.ModelName> = Exclude<
  Awaited<ReturnType<PrismaClient[Uncapitalize<T>]["findUnique"]>>,
  null
>;

export const validateModel = <T extends Prisma.ModelName>(
  model: T,
  data: GetModel<Prisma.ModelName>
): data is GetModel<T> => {
  const prismaModelEnum = Prisma[`${model}ScalarFieldEnum`];
  return Object.keys(prismaModelEnum)
    .map((v) => v in data)
    .every((v) => v);
};

Example usage:

import { Prisma, Model1, Model2, Model3 } from "@prisma/client";
import { prisma } from "@/libraries/prisma";

type Multiple = Model1 | Model2 | Model3;

const search = async (query: string): Promise<Multiple[]> => {
  const model1 = await prisma.model1.findMany({ where: { name: { contains: query } } });
  const model2 = await prisma.model2.findMany({ where: { name: { contains: query } } });
  const model3 = await prisma.model3.findMany({ where: { name: { contains: query } } });

  return [...model1, ...model2, ...model3];
}

const displayData = (model: Multiple) => {
  // How can i use the validator there (or something else) to validate the type of my model?
  if (validateModel("Model1", model)) return "model1";
  if (validateModel("Model2", model)) return "model2";
  if (validateModel("Model3", model)) return "model3";
}

const response = await search("hello world");

const data = displayData(response);
// do something with data

import { Prisma, Model1, Model2, Model3 } from "@prisma/client";
import { prisma } from "@/libraries/prisma";

type Multiple = Model1 | Model2 | Model3;

const search = async (query: string): Promise<Multiple[]> => {
  const model1 = await prisma.model1.findMany({ where: { name: { contains: query } } });
  const model2 = await prisma.model2.findMany({ where: { name: { contains: query } } });
  const model3 = await prisma.model3.findMany({ where: { name: { contains: query } } });

  return [...model1, ...model2, ...model3];
}

const displayData = (model: Multiple) => {
  // How can i use the validator there (or something else) to validate the type of my model?
  if (validateModel("Model1", model)) return "model1";
  if (validateModel("Model2", model)) return "model2";
  if (validateModel("Model3", model)) return "model3";
}

const response = await search("hello world");

const data = displayData(response);
// do something with data

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Validate Model