fix(usage): updade syntax usage to be dev only

Author: jimthedev

README.md

@@ -28,12 +28,16 @@ npm install seedquelize --save-dev
 
 ### Usage
 
-This example uses the following npm modules which you will have to install on your own:  `dotenv-safe`, `express`, `body-parser`, `sequelize` and `seedquelize` to start up an express app with seed data when not in production. Your database config info should be in a .env file. I've commented this file as much as possible to show how to use seeding in an actual app. Pull requests are welcome in order to make this more clear.
+This example shows how to use seedquelize with express sequelize and postgres.  It uses the following npm modules which you will have to install on your own:  `express`, `body-parser`, `sequelize` and `pg` as dependencies and `seedquelize` and `dotenv-safe` as dev dependencies.  You will need to npm install all of those dependencies for this example to work. You can also check out the examples directory.
+
+Your database config info should be in a .env file. I've commented this file as much as possible to show how to use seeding in an actual app. Pull requests are welcome in order to make this more clear.
 
 ```js
+let seed;
+
 if(process.env.NODE_ENV !== 'production') {
   require('dotenv-safe').config() // environment variables, used for hiding secrets
-  const seed = require('seedquelize')
+  seed = require('seedquelize')
 }
 
 const express = require('express')
@@ -52,7 +56,7 @@ const Artist = sequelize.define('artist', {
     type: Sequelize.STRING,
     field: 'genre'
   }
-}
+})
 
 const User = sequelize.define('user', {
   username: {
@@ -63,7 +67,7 @@ const User = sequelize.define('user', {
     type: Sequelize.STRING,
     field: 'twitter'
   }
-}
+})
 
 // This line saves your job by not deleting production data
 if(process.env.NODE_ENV !== 'production') {

examples/seedquelize-express/.env.example

@@ -0,0 +1 @@
+DATABASE_URL=

examples/seedquelize-express/.gitignore

@@ -0,0 +1,49 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules
+jspm_packages
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+.env

examples/seedquelize-express/index.js

@@ -0,0 +1,121 @@
+let seed;
+
+if(process.env.NODE_ENV !== 'production') {
+  require('dotenv-safe').config() // environment variables, used for hiding secrets
+  seed = require('seedquelize')
+}
+
+const express = require('express')
+const bodyParser = require('body-parser')
+const Sequelize = require('sequelize')
+
+// Connect to a sql database
+const sequelize = new Sequelize(process.env.DATABASE_URL)
+
+const Artist = sequelize.define('artist', {
+  name: {
+    type: Sequelize.STRING,
+    field: 'name'
+  },
+  genre: {
+    type: Sequelize.STRING,
+    field: 'genre'
+  }
+});
+
+const User = sequelize.define('user', {
+  username: {
+    type: Sequelize.STRING,
+    field: 'username'
+  },
+  twitter: {
+    type: Sequelize.STRING,
+    field: 'twitter'
+  }
+});
+
+// This line saves your job by not deleting production data
+if(process.env.NODE_ENV !== 'production') {
+  
+  // Clear out the existing database
+  sequelize.sync({force: true}).then(() => {
+    
+    // This shows the shape of the structure we are expecting.
+    // data is just an array of whatever models you want to create,
+    // model is of course the actual model you want created
+    const artists = {
+      data: [
+        {
+          name: 'Andrea Bocelli',
+          genre: 'Opera'
+        },
+        {
+          name: 'Britney Spears',
+          genre: 'Pop'
+        },
+        {
+          name: 'Lee Morgan',
+          genre: 'Jazz'
+        }
+      ],
+      model: Artist
+    }
+
+    const users = {
+      data: [
+        {
+          username: 'jimthedev',
+          twitter: '@jimthedev'
+        },
+        {
+          username: 'jnessview',
+          twitter: 'JNessView'
+        }
+      ],
+      model: User
+    }
+
+    // Actually seed the database using seedquelize
+    seed([
+      artists,
+      users
+    ]).then(() =>{
+      // Only started after seeding in dev/test
+      startExpress();
+    })
+  })
+} else {
+  // Started right away in prod
+  startExpress();
+}
+
+function startExpress() {
+  // Create a new express app to server our api
+  var app = express()
+
+  // Teach express how to parse requests of type application/json
+  //
+  app.use(bodyParser.json());
+
+  // Teach express how to parse requests of type application/x-www-form-urlencoded
+  //
+  app.use(bodyParser.urlencoded({ extended: true }));
+  
+  app.get('/api/artists', (req, res) => {
+    Artist.findAll().then((artists) => {
+      res.json(artists);
+    })
+  })
+  app.get('/api/users', (req, res) => {
+    User.findAll().then((users) => {
+      res.json(users);
+    })
+  })
+  // Determine which port to listen on
+  const port = process.env.PORT ? process.env.PORT : 3001
+
+  // Actually start the server
+  app.listen(port, () => {
+    console.log('Example app listening on port ' + port + '!')
+  })
+}

examples/seedquelize-express/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "seedquelize-express",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "body-parser": "^1.15.2",
+    "express": "^4.14.0",
+    "pg": "^6.1.2",
+    "sequelize": "^3.29.0"
+  },
+  "devDependencies": {
+    "dotenv-safe": "^4.0.3",
+    "seedquelize": "^1.0.0"
+  }
+}

package.json

@@ -28,7 +28,8 @@
   },
   "files": [
     "src/*.js",
-    "!src/*-spec.js"
+    "!src/*-spec.js",
+    "!examples/*"
   ],
   "homepage": "https://github.com/jimthedev/seedquelize#readme",
   "keywords": [