exercicios knex

semana16/aula47/.gitignore

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+node_modules
+package-lock.json
+build
+.env

semana16/aula47/package.json

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+{
+  "name": "aula47",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "dev": "ts-node-dev ./src/index.ts",
+    "start": "tsc && node ./build/index.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@types/cors": "^2.8.12",
+    "@types/express": "^4.17.13",
+    "ts-node-dev": "^1.1.8",
+    "typescript": "^4.5.2"
+  },
+  "dependencies": {
+    "@types/knex": "^0.16.1",
+    "cors": "^2.8.5",
+    "dotenv": "^10.0.0",
+    "express": "^4.17.1",
+    "knex": "^0.95.14",
+    "mysql": "^2.18.1"
+  }
+}

semana16/aula47/parte-escrita.md

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+### Exercício 01
+
+A) O raw nos devolve o resultado da Query e outras informações. Para pegar apenas
+o necessário, devemos pegar apenas a primeira posição do array que é devolvido

semana16/aula47/src/connection.ts

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+import knex from "knex";
+import dotenv from "dotenv";
+
+dotenv.config();
+
+const connection = knex({
+  client: "mysql",
+  connection: {
+    host: process.env.DB_HOST,
+    port: 3306,
+    user: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_SCHEMA,
+    multipleStatements: true,
+  },
+});
+
+export default connection;

semana16/aula47/src/index.ts

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+import express, { Express, Request, Response } from "express";
+import cors from "cors";
+import { AddressInfo } from "net";
+import dotenv from "dotenv";
+import connection from "./connection";
+
+dotenv.config();
+
+const app: Express = express();
+
+app.use(express.json());
+app.use(cors());
+
+// Exercício 01
+// B) Faça uma função que busque um ator pelo nome;
+const searchActor = async (name: string): Promise<any> => {
+  const result = await connection.raw(`
+      SELECT * FROM Actor WHERE name = "${name}"
+    `);
+  return result;
+};
+//C)Faça uma função que receba um gender retorne a quantidade de itens na tabela Actor com esse gender. Para atrizes, female e para atores male.
+const countActors = async (gender: string): Promise<any> => {
+  const result = await connection.raw(`
+      SELECT COUNT(*) as count FROM Actor WHERE gender = "${gender}"
+    `);
+  const count = result[0][0].count;
+  return count;
+};
+
+// Exercício 02
+// Utilize os *query builders* para criar funções de Typescript que realizem as operações abaixo. Tente prestar atenção nos tipos das variáveis de entrada e de saída.
+
+// a. Uma função que receba um salário e um id e realiza a atualização do salário do ator em questão*
+const updateActor = async (id: string, salary: number): Promise<any> => {
+  await connection("Actor")
+    .update({
+      salary: salary,
+    })
+    .where("id", id);
+};
+
+// b. Uma função que receba um id e delete um ator da tabela
+const deleteActor = async (id: string): Promise<void> => {
+  await connection("Actor").delete().where("id", id);
+};
+
+// c. Uma função que receba um gender e devolva a média dos salários de atrizes ou atores desse gender
+const returnAvgSalary = async (gender: string): Promise<any> => {
+  const result = await connection("Actor")
+    .avg("salary as average")
+    .where({ gender });
+  return result[0].average;
+};
+
+// Exercício 03
+// a. Crie um endpoint com as especificações acima
+// b.Crie um endpoint agora com as seguintes especificações
+app.get("/actor", async (req, res) => {
+  try {
+    const count = await countActors(req.query.gender as string);
+    res.status(200).send({ quantity: count });
+  } catch (err) {
+    res.status(400).send({
+      //   message: err.message,
+    });
+  }
+});
+
+//Exercício 04
+//A)
+app.put("/actor", async (req, res) => {
+  try {
+    await updateSalary(req.body.id, req.body.salary);
+    res.status(200).send({
+      message: "Success",
+    });
+  } catch (err) {
+    res.status(400).send({ message: err.message });
+  }
+});
+
+//B)
+app.delete("/actor/:id", async (req, res) => {
+  try {
+    await deleteActor(req.params.id);
+  } catch (err) {
+    res.status(400).send({ message: err.message });
+  }
+});
+
+//Exercício 05
+const createMovie = async (
+  id: string,
+  title: string,
+  synopsis: string,
+  releaseDate: Date,
+  playingLimitDate: Date
+) => {
+  await connection
+    .insert({
+      id: id,
+      title: title,
+      synopsis: synopsis,
+      releas_date: releaseDate,
+      playing_limit_date: playingLimitDate,
+    })
+    .into("Movie");
+};
+
+app.post("movie", async (req, res) => {
+  try {
+    await createMovie(
+      req.body.id,
+      req.body.title,
+      req.body.synopsis,
+      req.body.releaseData,
+      req.body.playingLimitDate
+    );
+    res.status(200).send({ message: "Success" });
+  } catch (err) {
+    res.status(400).send({ message: err.message });
+  }
+});
+
+//Exercício 06
+const getAllMovies = async (): Promise<any> => {
+  const result = await connection.raw(`
+      SELECT * FROM Movie LIMIT 15
+    `);
+
+  return result[0];
+};
+
+app.get("/movie/search", async (req, res) => {
+  try {
+    const movies = await searchMovie(req.query.query as string);
+    res.status(200).send({ movies: movies });
+  } catch (err) {
+    res.status(400).send({ message: err.message });
+  }
+});
+
+///////////////////////////////////////////////////////////////////////
+const server = app.listen(process.env.PORT || 3003, () => {
+  if (server) {
+    const address = server.address() as AddressInfo;
+    console.log(`Server is running in http://localhost: ${address.port}`);
+  } else {
+    console.error(`Failure upon starting server.`);
+  }
+});

semana16/aula47/tsconfig.json

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+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig.json to read more about this file */
+
+    /* Projects */
+    // "incremental": true,                              /* Enable incremental compilation */
+    // "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
+    // "tsBuildInfoFile": "./",                          /* Specify the folder for .tsbuildinfo incremental compilation files. */
+    // "disableSourceOfProjectReferenceRedirect": true,  /* Disable preferring source files instead of declaration files when referencing composite projects */
+    // "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
+    // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
+
+    /* Language and Environment */
+    "target": "es6" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
+    // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
+    // "jsx": "preserve",                                /* Specify what JSX code is generated. */
+    // "experimentalDecorators": true,                   /* Enable experimental support for TC39 stage 2 draft decorators. */
+    // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
+    // "jsxFactory": "",                                 /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h' */
+    // "jsxFragmentFactory": "",                         /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
+    // "jsxImportSource": "",                            /* Specify module specifier used to import the JSX factory functions when using `jsx: react-jsx*`.` */
+    // "reactNamespace": "",                             /* Specify the object invoked for `createElement`. This only applies when targeting `react` JSX emit. */
+    // "noLib": true,                                    /* Disable including any library files, including the default lib.d.ts. */
+    // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
+
+    /* Modules */
+    "module": "commonjs" /* Specify what module code is generated. */,
+    "rootDir": "./src" /* Specify the root folder within your source files. */,
+    // "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
+    // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
+    // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
+    // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
+    // "typeRoots": [],                                  /* Specify multiple folders that act like `./node_modules/@types`. */
+    // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
+    // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
+    // "resolveJsonModule": true,                        /* Enable importing .json files */
+    // "noResolve": true,                                /* Disallow `import`s, `require`s or `<reference>`s from expanding the number of files TypeScript should add to a project. */
+
+    /* JavaScript Support */
+    // "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the `checkJS` option to get errors from these files. */
+    // "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
+    // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */
+
+    /* Emit */
+    // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
+    // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
+    "sourceMap": true /* Create source map files for emitted JavaScript files. */,
+    // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */
+    "outDir": "./build" /* Specify an output folder for all emitted files. */,
+    // "removeComments": true,                           /* Disable emitting comments. */
+    // "noEmit": true,                                   /* Disable emitting files from a compilation. */
+    // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
+    // "importsNotUsedAsValues": "remove",               /* Specify emit/checking behavior for imports that are only used for types */
+    // "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
+    // "sourceRoot": "",                                 /* Specify the root path for debuggers to find the reference source code. */
+    // "mapRoot": "",                                    /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
+    // "inlineSources": true,                            /* Include source code in the sourcemaps inside the emitted JavaScript. */
+    // "emitBOM": true,                                  /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
+    // "newLine": "crlf",                                /* Set the newline character for emitting files. */
+    // "stripInternal": true,                            /* Disable emitting declarations that have `@internal` in their JSDoc comments. */
+    // "noEmitHelpers": true,                            /* Disable generating custom helper functions like `__extends` in compiled output. */
+    // "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
+    // "preserveConstEnums": true,                       /* Disable erasing `const enum` declarations in generated code. */
+    // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
+    // "preserveValueImports": true,                     /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */
+
+    /* Interop Constraints */
+    // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
+    // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
+    "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */,
+    // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
+    "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
+
+    /* Type Checking */
+    "strict": true /* Enable all strict type-checking options. */,
+    // "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied `any` type.. */
+    // "strictNullChecks": true,                         /* When type checking, take into account `null` and `undefined`. */
+    // "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
+    // "strictBindCallApply": true,                      /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */
+    // "strictPropertyInitialization": true,             /* Check for class properties that are declared but not set in the constructor. */
+    // "noImplicitThis": true,                           /* Enable error reporting when `this` is given the type `any`. */
+    // "useUnknownInCatchVariables": true,               /* Type catch clause variables as 'unknown' instead of 'any'. */
+    // "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
+    // "noUnusedLocals": true,                           /* Enable error reporting when a local variables aren't read. */
+    // "noUnusedParameters": true,                       /* Raise an error when a function parameter isn't read */
+    // "exactOptionalPropertyTypes": true,               /* Interpret optional property types as written, rather than adding 'undefined'. */
+    // "noImplicitReturns": true,                        /* Enable error reporting for codepaths that do not explicitly return in a function. */
+    // "noFallthroughCasesInSwitch": true,               /* Enable error reporting for fallthrough cases in switch statements. */
+    // "noUncheckedIndexedAccess": true,                 /* Include 'undefined' in index signature results */
+    // "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
+    // "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type */
+    // "allowUnusedLabels": true,                        /* Disable error reporting for unused labels. */
+    // "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */
+
+    /* Completeness */
+    // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
+    "skipLibCheck": true /* Skip type checking all .d.ts files. */
+  }
+}