Form a one-to-many relationship from a collection of elements

Question

Form a one-to-many relationship from a collection of elements

Seeking assistance with a programming issue I've been grappling with. Despite extensive research online, I haven't been able to find a solution. As someone new to coding, I would greatly appreciate guidance.

The specific task at hand involves establishing a 1-n relationship. The "1" corresponds to the Business entity, whereas the "n" pertains to data extracted from an array of objects.

My objectives are as follows:

Set up the Business entity
Create Trading Entities and associate them with the Business. Each Trading Entity's name should be derived from BN_NAME, while its status should originate from BN_STATUS.

While I am currently utilizing NestJS, any support in TypeScript would be invaluable for my learning process.

Thank you in advance for your help.

-Paul

Below is the schema I am working with:

model Business {
  id                Int                          @id @default(autoincrement())
  BN_ABN            Int?                         @unique
  tradingEntities   TradingEntity[]
}

model TradingEntity {
  id                Int            @id @default(autoincrement())
  Business          Business       @relation(fields: [BusinessId], references: [id])
  BusinessId        Int
  Name              String         //  BN_NAME from array of objects 
  Status            String         //  BN_STATUS from array of objects
}

Here is the array of objects:

[
  {
    _id: 1812602,
    REGISTER_NAME: 'BUSINESS NAMES',
    BN_NAME: 'Synergy Evolved',
    BN_STATUS: 'Registered',
    BN_REG_DT: '08/09/2012',
    BN_CANCEL_DT: null,
    BN_RENEW_DT: '08/09/2021',
    BN_STATE_NUM: null,
    BN_STATE_OF_REG: null,
    BN_ABN: '48166724204',
    rank: 0.0573088
  },
  {
    _id: 2199676,
    REGISTER_NAME: 'BUSINESS NAMES',
    BN_NAME: 'VALUERACK',
    BN_STATUS: 'Registered',
    BN_REG_DT: '11/04/2012',
    BN_CANCEL_DT: null,
    BN_RENEW_DT: '11/04/2015',
    BN_STATE_NUM: 'B2460084Y',
    BN_STATE_OF_REG: 'VIC',
    BN_ABN: '48166724204',
    rank: 0.0573088
  }
]

typescript prisma

Answer 1

Answer №1

Utilizing an array of objects, you have the ability to simultaneously generate both `Business` and `TradingEntity` records through a single Prisma query by employing the `connectOrCreate API`.

Below is a solution to integrate the data from the array of objects into your database.

// If we assume that this code is being executed within an async function
// And if the array of objects is being stored in a variable named "businessData"

for (const data of businessData) {
    const tradingEntity = await prisma.tradingEntity.create({
        data: {
            Name: data.BN_NAME,
            Status: data.BN_STATUS,
            Business: {
                connectOrCreate: {
                    /*
                    * This will either connect to an existing "Business" record with a matching BN_ABN if it exists,
                    * OR
                    * It will create a new "Business" record if there is no existing record with a matching BN_ABN.
                    */
                    where: {
                        BN_ABN: parseInt(data.BN_ABN)  //BN_ABN is a string in the object, so converted to Int to comply with Prisma Schema.
                    },
                    create: {
                        BN_ABN: parseInt(data.BN_ABN)
                    }
                }
            }
        }
    });
}

Based on the provided array of objects, the above code segment will:

Create two `TradingEntity` records with names "Synergy Evolved" and "VALUERACK".
Create one `Business` record with a BN_ABN of 922083948.

You may also want to consider modifying the field names in `TradingEntity` from PascalCase to camelCase as recommended by the naming conventions suggested in the Prisma documentation.

Answer 2

Utilizing an array of objects, you have the ability to simultaneously generate both `Business` and `TradingEntity` records through a single Prisma query by employing the `connectOrCreate API`.

Below is a solution to integrate the data from the array of objects into your database.

// If we assume that this code is being executed within an async function
// And if the array of objects is being stored in a variable named "businessData"

for (const data of businessData) {
    const tradingEntity = await prisma.tradingEntity.create({
        data: {
            Name: data.BN_NAME,
            Status: data.BN_STATUS,
            Business: {
                connectOrCreate: {
                    /*
                    * This will either connect to an existing "Business" record with a matching BN_ABN if it exists,
                    * OR
                    * It will create a new "Business" record if there is no existing record with a matching BN_ABN.
                    */
                    where: {
                        BN_ABN: parseInt(data.BN_ABN)  //BN_ABN is a string in the object, so converted to Int to comply with Prisma Schema.
                    },
                    create: {
                        BN_ABN: parseInt(data.BN_ABN)
                    }
                }
            }
        }
    });
}

Based on the provided array of objects, the above code segment will:

Create two `TradingEntity` records with names "Synergy Evolved" and "VALUERACK".
Create one `Business` record with a BN_ABN of 922083948.

You may also want to consider modifying the field names in `TradingEntity` from PascalCase to camelCase as recommended by the naming conventions suggested in the Prisma documentation.

Form a one-to-many relationship from a collection of elements

Answer №1

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