Integrate users and books

- new table userbook linking users and book
- moved rating to users book
- updated demo data and tests
- updated front to hide routes from non connected users

internal/model/book.go

@@ -6,5 +6,4 @@ type Book struct {
 	gorm.Model
 	Title  string `json:"title" gorm:"not null"`
 	Author string `json:"author"`
-	Rating int    `json:"rating"`
 }

internal/model/user.go

@@ -4,6 +4,7 @@ import "gorm.io/gorm"
 
 type User struct {
 	gorm.Model
-	Name     string `gorm:"index;uniqueIndex"`
-	Password string
+	Name      string `gorm:"index;uniqueIndex"`
+	Password  string
+	UserBooks []UserBook
 }

internal/model/userbook.go

@@ -0,0 +1,12 @@
+package model
+
+import "gorm.io/gorm"
+
+// describes the relationship between a user and a book.
+type UserBook struct {
+	gorm.Model
+	UserID uint
+	BookID uint
+	Book   Book
+	Rating int
+}