crud for a many to many relationship in prisma - postgresql

Question

so, i want to create a memory for a user and add the user to the memory api using prisma. in this user table and memory table are connected by a many to many relationship. They share a common table userMemory.
schema.prisma
model User {
userId String #id #default(uuid())
avatarUrl String?
bio String?
firstName String
lastName String?
dob DateTime
createdAt DateTime #default(now())
modifiedAt DateTime #default(now()) #updatedAt
createdBy String?
modifiedBy String?
followersCount BigInt #default(0)
followingCount BigInt #default(0)
memories UserMemory[]
}
model Memory {
memoryId String #id #default(uuid())
users UserMemory[]
latitude Float?
longitude Float?
createdAt DateTime #default(now())
modifiedAt DateTime #default(now()) #updatedAt
createdBy String?
modifiedBy String?
textHtml String?
mediaUrl String[]
}
This is my user services file
import { Injectable } from '#nestjs/common';
import { GraphQLError } from 'graphql/error';
import { PrismaService } from 'src/prisma/prisma.service';
import {
CreateUserInput,
OrderByInput,
UpdateUserInput,
} from 'src/types/graphql';
#Injectable()
export class UserService {
constructor(private prisma: PrismaService) {}
async create(createUserInput: CreateUserInput) {
try {
let user = await this.prisma.user.create({
data: createUserInput,
});
user = await this.prisma.user.update({
where: { userId: user.userId },
data: {
createdBy: user.userId,
modifiedBy: user.userId,
},
});
return user;
} catch (e) {
throw new GraphQLError('Error Occurred', {
extensions: { e },
});
}
}
}
This is my memories service file
import { Injectable } from '#nestjs/common';
import { GraphQLError } from 'graphql';
import { PrismaService } from 'src/prisma/prisma.service';
import { CreateMemoryInput, UpdateMemoryInput } from 'src/types/graphql';
#Injectable()
export class MemoriesService {
constructor(private prisma: PrismaService) {}
async create({ authorId, ...createMemoryInput }: CreateMemoryInput) {
try {
const user = await this.prisma.user.findUnique({
where: {
userId: authorId,
},
});
const memory = await this.prisma.memory.create({
data: {
...createMemoryInput,
createdBy: authorId,
modifiedBy: authorId,
users: {
create: [
{
user: {
connect: {
userId: authorId,
...user,
},
},
},
],
},
},
include: {
users: true,
},
});
return memory;
} catch (e) {
throw new GraphQLError('Error Occurred', {
extensions: { e },
});
}
}
async findOne(memoryId: string) {
try {
return await this.prisma.memory.findUnique({
where: {
memoryId,
},
include: {
users: true,
},
});
} catch (e) {
throw new GraphQLError('Error Occurred', {
extensions: { e },
});
}
}
}
my users type defination file
scalar Date
scalar URL
scalar Timestamp
scalar UUID
type User {
userId: UUID!
avatarUrl: URL
bio: String
firstName: String!
lastName: String
dob: Date
createdAt: Timestamp
modifiedAt: Timestamp
createdBy: UUID
modifiedBy: UUID
memories: [Memory]
}
input CreateUserInput {
firstName: String!
lastName: String
dob: Date!
}
type Mutation {
createUser(createUserInput: CreateUserInput!): User!
}
my memories type defination file
type Memory {
memoryId: UUID!
users: [User]
latitude: Float
longitude: Float
createdAt: Timestamp
modifiedAt: Timestamp
createdBy: UUID
modifiedBy: UUID
textHtml: String
mediaUrl: [String]
}
input CreateMemoryInput {
authorId: UUID!
latitude: Float
longitude: Float
textHtml: String
mediaUrl: [String]
}
type Query {
memories: [Memory]!
memory(memoryId: UUID!): Memory
}
type Mutation {
createMemory(createMemoryInput: CreateMemoryInput!): Memory!
}
this is my creat mutation query
mutation CreateMemory($createMemoryInput: CreateMemoryInput!) {
createMemory(createMemoryInput: $createMemoryInput) {
createdAt
createdBy
latitude
longitude
mediaUrl
memoryId
modifiedAt
modifiedBy
textHtml
users {
accountType
avatarUrl
bio
createdAt
createdBy
dob
firstName
gender
lastName
modifiedAt
modifiedBy
userId
}
}
}
so whenever i am creating a memoory against a user, i am getting this error, although data is population in data base.
{
"errors": [
{
"message": "Cannot return null for non-nullable field User.firstName.",
"locations": [
{
"line": 43,
"column": 7
}
],
"path": [
"memory",
"users",
0,
"firstName"
],
"extensions": {
"code": "INTERNAL_SERVER_ERROR",
"exception": {
"stacktrace": [
"Error: Cannot return null for non-nullable field User.firstName.",
" at completeValue (/Users/sohamnandi/Desktop/Projects/link-yatri-api/node_modules/graphql/execution/execute.js:594:13)",
" at executeField (/Users/sohamnandi/Desktop/Projects/link-yatri-api/node_modules/graphql/execution/execute.js:489:19)",
" at executeFields (/Users/sohamnandi/Desktop/Projects/link-yatri-api/node_modules/graphql/execution/execute.js:413:20)",
" at completeObjectValue (/Users/sohamnandi/Desktop/Projects/link-yatri-api/node_modules/graphql/execution/execute.js:914:10)",
" at completeValue (/Users/sohamnandi/Desktop/Projects/link-yatri-api/node_modules/graphql/execution/execute.js:635:12)",
" at /Users/sohamnandi/Desktop/Projects/link-yatri-api/node_modules/graphql/execution/execute.js:696:25",
" at Function.from (<anonymous>)",
" at completeListValue (/Users/sohamnandi/Desktop/Projects/link-yatri-api/node_modules/graphql/execution/execute.js:676:34)",
" at completeValue (/Users/sohamnandi/Desktop/Projects/link-yatri-api/node_modules/graphql/execution/execute.js:607:12)",
" at executeField (/Users/sohamnandi/Desktop/Projects/link-yatri-api/node_modules/graphql/execution/execute.js:489:19)"
]
}
}
}
],
"data": {
"memory": {
"createdAt": 1674566005576,
"createdBy": "5a147521-a797-4587-b75f-a07f5b00430e",
"latitude": null,
"longitude": null,
"mediaUrl": [],
"memoryId": "0f2a1a5a-298b-4b8c-a526-7e06e0d4b126",
"modifiedAt": 1674566005576,
"modifiedBy": "5a147521-a797-4587-b75f-a07f5b00430e",
"textHtml": null,
"users": [
null
]
}
}
}