revisar update y falta delete

src/programa/dto/programa.dto.ts

@@ -0,0 +1,6 @@
+import { IsOptional, IsString } from 'class-validator';
+
+export class ProgramaDto {
+    @IsString()
+    id_programa: string;
+}

src/programa/programa.controller.ts

@@ -1,6 +1,7 @@
-import { Body, Controller, Get, Post } from '@nestjs/common';
+import { Body, Controller, Get, Post, Query } from '@nestjs/common';
 import { ProgramaService } from './programa.service';
 import { ProgramaCreateDto } from './dto/programa-create.dto';
+import { ProgramaDto } from './dto/programa.dto'
 
 @Controller('programa')
 export class ProgramaController {
@@ -15,4 +16,9 @@ export class ProgramaController {
   get() {
     return this.programaService.findAll();
   }
+
+  @Get('programa')
+  programa(@Query() query: ProgramaDto) {
+    return this.programaService.findById(Number(query.id_programa))
+  }
 }

src/programa/programa.service.ts

@@ -1,4 +1,4 @@
-import { ConflictException, Injectable } from '@nestjs/common';
+import { ConflictException, Injectable, NotFoundException } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { Repository } from 'typeorm';
 import { Programa } from './entity/programa.entity';
@@ -23,4 +23,11 @@ export class ProgramaService {
   findAll() {
     return this.repository.find();
   }
+
+  findById(id_programa: number) {
+    return this.repository.findOne({ id_programa }).then((programa) => {
+      if(!programa) throw new NotFoundException('No existe este programa')
+      return programa
+    })
+  }
 }