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WAAYZZz 🍀

•Created by WAAYZZz 🍀 on 3/4/2025 in #help

Use zod schema generated with prisma with @hono/zod-openapi

Is there a way to use already generated zod schema with @hono/zod-openapi ? The Zod schemas generated by Prisma are not enhanced the way @hono/zod-openapi provides. Does anyone know a way to enhance them for use with createRoute from @hono/zod-openapi (request.params, json validator, ...)

81 replies

HHono

•Created by WAAYZZz 🍀 on 4/3/2024 in #help

Type checking with Hono + prisma + zod -> return json date (expect string)

HI, i m usin openAPi I declared return params in my route

const getUserRoute = createRoute({
  method: 'get',
  path: '/',
  responses: {
    200: {
      description: 'Respond after getting his user',
      content: {
        'application/json': {
          schema: schema: z.object({
            id: z.string(),
            email: z.string(),
            username: z.string(),
            createdAt: z.coerce.date(),
            lastLoginOn: z.coerce.date(),
          }),
        },
      },
    },
    404: {
      description: 'User not found',
      content: {
        'application/json': {
          schema: ErrorSchema,
        },
      },
    },
  },
});

app.openapi(getUserRoute, async (c) => {
  const id = c.get('id');
  const user = await getUser({ id });
  if (user) {
    return c.json({
      id: user.id,
      email: user.email,
      username: user.username,
      createdAt: user.createdAt,
      lastLoginOn: user.lastLoginOn,
    });
  }
  return c.json({
    error: 'User not found',
  }, 404);

const getUserRoute = createRoute({
  method: 'get',
  path: '/',
  responses: {
    200: {
      description: 'Respond after getting his user',
      content: {
        'application/json': {
          schema: schema: z.object({
            id: z.string(),
            email: z.string(),
            username: z.string(),
            createdAt: z.coerce.date(),
            lastLoginOn: z.coerce.date(),
          }),
        },
      },
    },
    404: {
      description: 'User not found',
      content: {
        'application/json': {
          schema: ErrorSchema,
        },
      },
    },
  },
});

app.openapi(getUserRoute, async (c) => {
  const id = c.get('id');
  const user = await getUser({ id });
  if (user) {
    return c.json({
      id: user.id,
      email: user.email,
      username: user.username,
      createdAt: user.createdAt,
      lastLoginOn: user.lastLoginOn,
    });
  }
  return c.json({
    error: 'User not found',
  }, 404);

my prisma schema generating

model User {
  id                String                @id @default(cuid())
  email             String                @unique /// @zod.string.email({ message: 'Invalid email address' }),
  username          String                @unique
  password          String
  isEmailValided    Boolean
  createdAt         DateTime              @default(now())
  lastLoginOn       DateTime?
  plans             UserWithPermissions[]
  passwordForgotten PasswordForgotten[]
}

model User {
  id                String                @id @default(cuid())
  email             String                @unique /// @zod.string.email({ message: 'Invalid email address' }),
  username          String                @unique
  password          String
  isEmailValided    Boolean
  createdAt         DateTime              @default(now())
  lastLoginOn       DateTime?
  plans             UserWithPermissions[]
  passwordForgotten PasswordForgotten[]
}

But since the json return transform date to string, type checking is wrong. What is the best thing to do to handle that ? (the return schema is generated by zod-prisma-types) it's look easy but i m new with zod and openApi If i change z.coerce.date() to z.string() type checking will work, but thoz zod object is auto generated by zod-prisma-types

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