Crud api

beginner/CRUD_API/go.mod

@@ -0,0 +1,15 @@
+module golangexample/sampleapp
+
+go 1.19
+
+require (
+	github.com/gorilla/mux v1.8.0
+	github.com/jinzhu/gorm v1.9.16
+	gorm.io/gorm v1.24.0
+)
+
+require (
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.4 // indirect
+	github.com/mattn/go-sqlite3 v1.14.15 // indirect
+)

beginner/CRUD_API/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/gorilla/mux"
+)
+
+func initializeRouter() {
+	r := mux.NewRouter()
+
+	r.HandleFunc("/users", GetUsers).Methods("GET")
+	r.HandleFunc("/users/{id}", GetUser).Methods("GET")
+	r.HandleFunc("/users", CreateUser).Methods("POST")
+	r.HandleFunc("/users/{id}", UpdateUser).Methods("PUT")
+	r.HandleFunc("/users/{id}", DeleteUser).Methods("DELETE")
+
+	log.Fatal(http.ListenAndServe(":9001", r))
+}
+
+func main() {
+	IntialMigration()
+	initializeRouter()
+}

beginner/CRUD_API/user.go

@@ -0,0 +1,95 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/gorilla/mux"
+	"github.com/jinzhu/gorm"
+	_ "github.com/jinzhu/gorm/dialects/sqlite"
+)
+
+
+var DB *gorm.DB
+var err error
+
+
+//Gorm is used to convert our struct into a model struct so that we can store date in db using ORM
+type User struct{
+
+	gorm.Model
+	FirstName string `json:"first_name"`
+	LasName string `json:"last_name"`
+	Email string `json:"email"`
+
+
+}
+
+func IntialMigration(){
+	DB, err = gorm.Open("sqlite3", "user.db")
+	if err != nil {
+        panic("Failed to open the SQLite database.")
+    }
+	//defer DB.Close()
+
+    // Create the table from our struct
+    DB.AutoMigrate(&User{})
+
+
+}
+
+//arguments includes the response writer and the a pointer pointing to the actual request that came in
+func GetUsers(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+	//slice 
+	var users []User
+    DB.Find(&users)
+    json.NewEncoder(w).Encode(users)
+
+}
+
+func GetUser(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+	var user User
+	params :=mux.Vars(r)
+	DB.First(&user,params["id"])
+    json.NewEncoder(w).Encode(user)
+
+}
+
+func DeleteUser(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+	var user User
+	params :=mux.Vars(r)
+	DB.Delete(&user,params["id"])
+    json.NewEncoder(w).Encode("The user is deleted")
+
+}
+
+func CreateUser(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+	var user User
+	err := json.NewDecoder(r.Body).Decode(&user)
+	if err!= nil {
+        w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+        return
+	}
+	DB.Create(&user)
+	json.NewEncoder(w).Encode(user)
+
+
+
+}
+
+func UpdateUser(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+	var user User
+	params :=mux.Vars(r)
+	DB.First(&user,params["id"])
+	json.NewDecoder(r.Body).Decode(&user)
+	DB.Save(&user)
+    json.NewEncoder(w).Encode(user)
+
+
+}