mysql下

utf8 = 3byte
utf8mb4 = 4byte

MyISAM 主键最长1000byte = 333*utf8 = 240*utf8mb4
InnoDB 主键最长767byte = 255*urf8 = 191*utf8mb4

所以@Id注解默认长度255在mysql下特定字符集下会报错，故设定字段长度为127

src/main/java/cc/ryanc/halo/model/domain/Options.java

@@ -2,10 +2,7 @@ package cc.ryanc.halo.model.domain;
 
 import lombok.Data;
 
-import javax.persistence.Entity;
-import javax.persistence.Id;
-import javax.persistence.Lob;
-import javax.persistence.Table;
+import javax.persistence.*;
 import java.io.Serializable;
 
 /**
@@ -27,6 +24,7 @@ public class Options implements Serializable {
      * 设置项名称
      */
     @Id
+    @Column(length = 127)
     private String optionName;
 
     /**