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The seed_alumnos message pattern is exposed by SeedController and delegates to SeedService.runSeed(). When invoked, it issues a raw SQL TRUNCATE TABLE "alumnos" RESTART IDENTITY CASCADE to wipe all existing student records and reset the auto-increment primary key counter back to 1, then constructs and saves 100 pre-defined sample Alumno entities in a single repository.save() call. Because each entity passes through the @BeforeInsert() lifecycle hook, every sample student’s password is bcrypt-hashed before it lands in the database.

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Message pattern

{ "cmd": "seed_alumnos" }

​
Request payload

This message takes no meaningful payload. Send an empty object or omit the body entirely.
​
(none)
undefined
No parameters are required or accepted. The seed data is entirely pre-defined in src/seed/data/sees.data.ts.

​
Response

​
message
string
A fixed confirmation string: 'Seed ejecutado correctamente'.
​
count
number
The number of student records inserted. This is always 100 when using the default seed dataset shipped with the service.

​
Example

import { connect, JSONCodec } from 'nats';

const nc = await connect({ servers: 'nats://localhost:4222' });
const jc = JSONCodec();

const res = await nc.request(
  'seed_alumnos',
  jc.encode({}),
  { timeout: 15000 } // Allow extra time for 100 inserts
);

console.log(jc.decode(res.data));
// { message: 'Seed ejecutado correctamente', count: 100 }

await nc.drain();

​
What gets seeded

The 100 sample students are statically defined in src/seed/data/sees.data.ts and cover a realistic cross-section of Peruvian university profiles:
AttributeValues present in seed data
UniversitiesUNMSM, UNI, PUCP, USMP
FacultiesFISI, Facultad de Medicina, Facultad de Derecho, Facultad de Psicología, Facultad de Ingeniería, Facultad de Ciencias, and many others
DegreesBachiller, Licenciado, Magíster, Doctor
DNIsSequential integers from 10000001 through 10000100 (8-digit strings)
Emails<first>.<last>@example.com pattern (unique per record)
Celular900000001 through 900000100
AgesRange from 24 to 35
PasswordEvery record has a plain-text contrasena of 'contrasena', which is bcrypt-hashed at 10 rounds via the @BeforeInsert() hook before the row is written to the database
This operation is destructive. TRUNCATE TABLE "alumnos" RESTART IDENTITY CASCADE permanently deletes all existing rows in the alumnos table and resets the auto-increment ID counter to 1 before inserting the 100 sample records. Any real student data in the table will be irreversibly lost. Do not run seed_alumnos in a production environment that holds real data.

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