add example apis that interact with a database.

Author: Ben Turbes

.gitignore

@@ -1 +1,2 @@
-demo_api
+demo_api
+demo.db

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:alpine
+FROM golang
 
 RUN mkdir -p /go/src/github.com/bturbes/demo_api
 WORKDIR /go/src/github.com/bturbes/demo_api

articles/create.go

@@ -0,0 +1,20 @@
+package articles
+
+import (
+	"net/http"
+
+	"github.com/labstack/echo"
+
+	"github.com/bturbes/demo_api/database"
+	"github.com/bturbes/demo_api/models"
+)
+
+// Create a new article.
+func Create(c echo.Context) error {
+	a := new(models.Article)
+	if err := c.Bind(a); err != nil {
+		return err
+	}
+	database.Db.Create(&a)
+	return c.String(http.StatusOK, "Created the article")
+}

articles/list.go

@@ -0,0 +1,19 @@
+package articles
+
+import (
+	"net/http"
+
+	"github.com/labstack/echo"
+
+	"github.com/bturbes/demo_api/database"
+	"github.com/bturbes/demo_api/models"
+)
+
+// List all the articles.
+func List(c echo.Context) error {
+	articles := []models.Article{}
+	if err := database.Db.Find(&articles).Error; err != nil {
+		return c.String(http.StatusInternalServerError, "There was an error creating article.")
+	}
+	return c.JSONPretty(http.StatusOK, &articles, "  ")
+}

database/db.go

@@ -0,0 +1,10 @@
+package database
+
+import (
+	"github.com/jinzhu/gorm"
+)
+
+var (
+	// Db holds the database connection info.
+	Db *gorm.DB
+)

docker-compose.yml

@@ -1,10 +1,10 @@
 version: '2'
 services:
   web:
-    image: golang:alpine
+    image: golang
     command: sh -c "go build && ./demo_api"
     ports:
-      - "9000:8080"
-    volumes: 
+      - "8080:8080"
+    volumes:
       - ".:/go/src/github.com/bturbes/demo_api"
     working_dir: /go/src/github.com/bturbes/demo_api

main.go

@@ -4,21 +4,36 @@ import (
 	"log"
 	"net/http"
 
+	"github.com/jinzhu/gorm"
+	_ "github.com/jinzhu/gorm/dialects/sqlite"
 	"github.com/labstack/echo"
 	"github.com/labstack/echo/middleware"
 
+	"github.com/bturbes/demo_api/articles"
+	"github.com/bturbes/demo_api/database"
 	myEcho "github.com/bturbes/demo_api/echo"
 	"github.com/bturbes/demo_api/formats"
 	"github.com/bturbes/demo_api/math"
+	"github.com/bturbes/demo_api/models"
 )
 
 func main() {
+	var err error
+	database.Db, err = gorm.Open("sqlite3", "demo.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer database.Db.Close()
+	models.MigrateAll()
+
 	e := echo.New()
 	e.GET("/", Index)
 	e.GET("/add/:a/:b", math.Add)
 	e.GET("/subtract/:a/:b", math.Subtract)
 	e.GET("/sampledata", formats.SampleData)
 	e.POST("/echo", myEcho.Echo)
+	e.POST("/articles/create", articles.Create)
+	e.GET("/articles/list", articles.List)
 
 	e.Use(middleware.Logger())
 	e.Use(middleware.CORS())

models/article.go

@@ -0,0 +1,13 @@
+package models
+
+import (
+	"github.com/jinzhu/gorm"
+)
+
+// Article contains the Title, Author, and Body of an article
+type Article struct {
+	gorm.Model
+	Title  string
+	Author string
+	Body   string
+}

models/migrations.go

@@ -0,0 +1,8 @@
+package models
+
+import "github.com/bturbes/demo_api/database"
+
+// MigrateAll runs all the migrations for the models
+func MigrateAll() {
+	database.Db.AutoMigrate(&Article{})
+}