IdentityServer4使用EFCore生成MySql Column length too big for column 'Data' (max = 21845);

IdentityServer4中，使用efcore生成PersistedGrant数据库时报错，错误信息如下：

Column length too big for column 'Data' (max = 21845);

Column length too big for column 'Data' (max = 21845); use BLOB or TEXT instead

错误提示最大长度限制问题

查看生成结构代码

            migrationBuilder.CreateTable(
                name: "DeviceCodes",
                columns: table => new
                {
                    UserCode = table.Column<string>(maxLength: 200, nullable: false),
                    DeviceCode = table.Column<string>(maxLength: 200, nullable: false),
                    SubjectId = table.Column<string>(maxLength: 200, nullable: true),
                    ClientId = table.Column<string>(maxLength: 200, nullable: false),
                    CreationTime = table.Column<DateTime>(nullable: false),
                    Expiration = table.Column<DateTime>(nullable: false),
                    Data = table.Column<string>(maxLength: 50000, nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_DeviceCodes", x => x.UserCode);
                });

            migrationBuilder.CreateTable(
                name: "PersistedGrants",
                columns: table => new
                {
                    Key = table.Column<string>(maxLength: 200, nullable: false),
                    Type = table.Column<string>(maxLength: 50, nullable: false),
                    SubjectId = table.Column<string>(maxLength: 200, nullable: true),
                    ClientId = table.Column<string>(maxLength: 200, nullable: false),
                    CreationTime = table.Column<DateTime>(nullable: false),
                    Expiration = table.Column<DateTime>(nullable: true),
                    Data = table.Column<string>(maxLength: 50000, nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_PersistedGrants", x => x.Key);
                });

字段中，Data字段应该为 text类型即可，如下：

Data = table.Column<string>("text", maxLength: 50000, nullable: false)

 

来源：oschina

链接：https://my.oschina.net/berzhuan/blog/4327313