fix: user can only react one post

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/gin-contrib/cors v1.7.2
 	github.com/gin-gonic/gin v1.10.0
 	github.com/go-sql-driver/mysql v1.8.1
+	github.com/joho/godotenv v1.5.1
 )
 
 require (

go.sum

@@ -35,6 +35,8 @@ github.com/goccy/go-json v0.10.3/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PU
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=

main.go

@@ -11,6 +11,7 @@ import (
 	"github.com/gin-contrib/cors"
 	"github.com/gin-gonic/gin"
 	"github.com/go-sql-driver/mysql"
+	"github.com/joho/godotenv"
 
 	"log101-blog-services/middleware"
 )
@@ -67,6 +68,11 @@ func countEmojis(postId string) ([]EmojiCount, error) {
 }
 
 func main() {
+	err := godotenv.Load()
+	if err != nil {
+		log.Fatal("Error loading .env file")
+	}
+
 	mysqlHost := os.Getenv("DBHOST")
 	cfg := mysql.Config{
 		User:   os.Getenv("DBUSER"),
@@ -75,8 +81,7 @@ func main() {
 		Addr:   mysqlHost + ":3306",
 		DBName: "emojis",
 	}
-	// Get a database handle.
-	var err error
+
 	db, err = sql.Open("mysql", cfg.FormatDSN())
 	if err != nil {
 		log.Fatal(err)

schema.sql

@@ -5,8 +5,9 @@ USE emojis;
 
 CREATE TABLE IF NOT EXISTS emoji_clicks (
     id INT PRIMARY KEY AUTO_INCREMENT,
-    user_anon_data VARCHAR(50) UNIQUE,
-    post_id TEXT NOT NULL,
+    user_anon_data VARCHAR(50),
+    post_id VARCHAR(50) NOT NULL,
     emoji TEXT NOT NULL,
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(`post_id`, `user_anon_data`)
 );