Project setup

README.md

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-# Building an API using a Relational Database
+## Building an API using a Relational Database
 
 ## Topics
 

index.js

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+// Manage Roles (id, name)
+const express = require("express");
+const helmet = require("helmet");
+const knex = require("knex");
+
+const knexConfig = {
+  client: "sqlite3",
+  connection: {
+    filename: "./data/lambda.sqlite3"
+  },
+  useNullAsDefault: true // needed for sqlite
+};
+const db = knex(knexConfig);
+
+const server = express();
+
+server.use(helmet());
+server.use(express.json());
+
+server.get("/", (req, res) => {
+  res.send("Server Works.");
+});
+
+server.get("/api/cohorts", async (req, res) => {
+  try {
+    const cohorts = await db("cohorts");
+    res.status(200).json(cohorts);
+  } catch (err) {
+    res.status(500).json({
+      error: "Could not get cohorts."
+    });
+  }
+});
+
+server.post("/api/cohorts", async (req, res) => {
+  try {
+    if (!req.body.name) {
+      res.status(500).json({
+        message: "Please provide a name."
+      });
+    } else {
+      const [id] = await db("cohorts").insert(req.body);
+      const cohort = await db("cohorts")
+        .where({ id })
+        .first();
+      res.status(201).json(cohort);
+    }
+  } catch (err) {
+    res.status(500).json({
+      error: "Could not create new cohort."
+    });
+  }
+});
+
+server.get("/api/cohorts/:id", async (req, res) => {
+  try {
+    const role = await db("cohorts")
+      .where({ id: req.params.id })
+      .first();
+    res.status(200).json(role);
+  } catch (error) {
+    res.status(500).json(error);
+  }
+});
+
+server.put("/api/cohorts/:id", async (req, res) => {
+  try {
+    const count = await db("cohorts")
+      .where({ id: req.params.id })
+      .update(req.body);
+
+    if (count > 0) {
+      const cohort = await db("cohorts")
+        .where({ id: req.params.id })
+        .first();
+
+      res.status(200).json(cohort);
+    } else {
+      res.status(404).json({ message: "Cohort not found" });
+    }
+  } catch (error) {}
+});
+
+server.delete("/api/cohorts/:id", async (req, res) => {
+  try {
+    const count = await db("cohorts")
+      .where({ id: req.params.id })
+      .del();
+
+    if (count > 0) {
+      res.status(204).json({
+        message: "Cohort deleted."
+      });
+    } else {
+      res.status(404).json({
+        message: "Cohort not found"
+      });
+    }
+  } catch (err) {}
+});
+
+const port = process.env.PORT || 5000;
+server.listen(port, () =>
+  console.log(`\nrunning on http://localhost:${port}\n`)
+);

knexfile.js

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+// Update with your config settings.
+
+module.exports = {
+  development: {
+    client: "sqlite3",
+    connection: {
+      filename: "./data/lambda.sqlite3"
+    },
+    useNullAsDefault: true
+  }
+};

migrations/20190220124826_cohorts.js

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+exports.up = function(knex, Promise) {
+  return knex.schema.createTable("cohorts", function(tbl) {
+    tbl.increments();
+    tbl
+      .string("name", 128)
+      .notNullable()
+      .unique();
+  });
+};
+
+exports.down = function(knex, Promise) {
+  return knex.schema.dropTableIfExists("cohorts");
+};

migrations/20190220125424_students.js

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+exports.up = function(knex, Promise) {
+  return knex.schema.createTable("students", function(tbl) {
+    tbl.increments();
+    tbl
+      .string("name", 128)
+      .notNullable()
+      .unique();
+  });
+};
+
+exports.down = function(knex, Promise) {
+  return knex.schema.dropTableIfExists("students");
+};

package.json

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+{
+  "name": "rolex",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "server": "nodemon index.js"
+  },
+  "keywords": [],
+  "author": "Web XVI",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.16.4",
+    "helmet": "^3.15.1",
+    "knex": "^0.16.3",
+    "sqlite3": "^4.0.6"
+  },
+  "devDependencies": {
+    "nodemon": "^1.18.10"
+  }
+}

seeds/cohorts.js

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+
+exports.seed = function(knex, Promise) {
+  // Deletes ALL existing entries
+  return knex('table_name').del()
+    .then(function () {
+      // Inserts seed entries
+      return knex('table_name').insert([
+        {id: 1, colName: 'rowValue1'},
+        {id: 2, colName: 'rowValue2'},
+        {id: 3, colName: 'rowValue3'}
+      ]);
+    });
+};