Added init log messages

cmd/server.go

@@ -22,8 +22,9 @@ func main() {
 
 	s, err := storage.InitStorage()
 	if err != nil {
-		log.Panic("could not connect to database")
+		log.Fatalf("failed to init storage: %s", err)
 	}
+	log.Println("finished storage init")
 
 	res := graph.InitResolver(s)
 	srv := handler.NewDefaultServer(graph.NewExecutableSchema(graph.Config{Resolvers: res}))

internal/storage/db/postgres.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"fmt"
+	"log"
 	"os"
 
 	"git.obamna.ru/erius/ozon-task/graph/model"
@@ -19,11 +20,20 @@ var (
 )
 
 func InitPostgres() (*Database, error) {
+	log.Printf("connecting to PostgreSQL database at %s...", con)
 	// PrepareStmt is true for caching complex sql statements when adding comments or replies
 	db, err := gorm.Open(postgres.Open(con), &gorm.Config{PrepareStmt: true})
 	if err != nil {
+		log.Printf("failed to connect to database: %s", err)
 		return nil, err
 	}
-	db.AutoMigrate(&model.Post{}, &model.Comment{})
+	log.Println("opened connection to PostgreSQL database")
+	log.Println("migrating model scheme to database...")
+	err = db.AutoMigrate(&model.Post{}, &model.Comment{})
+	if err != nil {
+		log.Printf("failed to automatically migrate model scheme: %s", err)
+		return nil, err
+	}
+	log.Println("finished migrating model scheme")
 	return &Database{db}, nil
 }

internal/storage/storage.go

@@ -1,6 +1,7 @@
 package storage
 
 import (
+	"log"
 	"os"
 
 	"git.obamna.ru/erius/ozon-task/graph/model"
@@ -21,12 +22,14 @@ type Storage interface {
 }
 
 func InitStorage() (Storage, error) {
+	log.Printf("initializing storage of type %s...", storage)
 	switch storage {
 	case inMemory:
 		return InitInMemory(), nil
 	case postgres:
 		return db.InitPostgres()
 	default:
+		log.Printf("storage of type %s doesn't exists, falling back to default in-memory storage", storage)
 		return InitInMemory(), nil
 	}
 }