Prisma Parser - Support @map

[MH4GF]

Task description

model User {
  id String @default(auto()) @map("_id") @db.ObjectId
}

ref: https://www.prisma.io/docs/orm/prisma-schema/data-model/models#mapping-model-names-to-tables-or-collections

Field names and actual column names can be set separately and need to be supported.
For ERD tools, we want to use properties that match the actual table.

[MH4GF]

📝 I'm noticing that a different approach seems to be needed, so here's a note.

Suppose we have a schema like the following:

        model users {
          id Int @id @default(autoincrement())
          posts posts[].
        }

        model posts {
          id Int @id @default(autoincrement())
          user users @relation(fields: [user_id], references: [id])
          user_id Int @map(“raw_user_id”))
        }

Since raw_user_id specified by @map is the column name of the real table, we want to use this for DBStructure.

field obj: user_id
{
  name: 'user_id', dbName: 'raw_user_id
  dbName: 'raw_user_id', // we can get it from here
  kind: 'scalar',
  isList: false, isRequired: true, isRequired: true, isRequired: false
  isRequired: true, isUnique: false, isSubject: false, isSubject: false
  isUnique: false, isId: false, isScalar: true, isList: false, isRequired: true, isScalar: false
  isId: false, isReadOnly: true, isReadOnly: true
  
  hasDefaultValue: false, isDefaultValue: false, isDefaultValue: false, isDefaultValue: false, isDefaultValue: false
  type: 'Int', nativeType: null, nativeType: null, nativeType: null, nativeType: null
  
  isGenerated: false, isUpdatedAt: false
  isUpdatedAt: false
}

And the post.user_id relation would look like this.

{
  name: 'user', ``type: 'object', ``s
  
  isList: false, isRequired: true, isRequired: true, isRequired: false, isRequired: true, isRequired: false
  
  
  isId: false, isReadOnly: false, isReadOnly: false, isReadOnly: false, isReadOnly: false
  isReadOnly: false, isRequired: true, isUnique: false, isId: false, isReadOnly: false, isDefaultValue: false, isDefaultValue: false
  hasDefaultValue: false, type: 'users', isList: false, isRequired: true, isUnique: false, isId: false, isReadOnly: false, isDefaultValue: false
  
  
  
  relationFromFields: [ 'user_id' ], relationToFields: [ 'id
  
  isGenerated: false, isUpdatedAt: false
  isUpdatedAt: false
}

The problem is that relationFromFields references a user_id column.
If you use raw_user_id for DBStructure, it will not be associated correctly.
You will need to do handling for the association separately.

The @map names are also used for index naming, but they cannot be obtained directly from the index obj, so handling is required.