VVSequelize

改动(0.4.7)

移除accessible. 不建议访问appgroup中的数据库, 所以去掉此功能.
移除cache. 因为sqlite3_update_hook()不能完全hook所有delete, drop操作, cache将不能被有效更新,会导致查询到错误数据, 所以去掉此功能, 由用户自行管理缓存.

功能

结构

安装

pod 'VVSequelize', '~> 0.4.7'

使用测试版本:

    pod 'VVSequelize', :git => 'https://github.com/pozi119/VVSequelize.git'

注意

子对象会保存成为Json字符串,子对象内的NSData也会保存为16进制字符串.
含有子对象时,请确保不会循环引用,否则Dictionary/Object互转会死循环,请将相应的循环引用加入互转黑名单.
VVKeyValue仅用于本工具,不适用常规的Json转对象.

用法

此处主要列出一些基本用法,详细用法请阅读代码注释.

打开/创建数据库文件

    self.vvdb = [[VVDatabase alloc] initWithPath:dbPath];

定义ORM配置

手动创建VVOrmConfig.
普通表适配协议VVOrmable, fts表适配协议VVFtsable

注意: 已移除fts3/4的支持,仅使用fts5

定义ORM模型

可自定义表名和存放的数据库文件. 生成的模型将不在保存在ModelPool中,防止表过多导致内存占用大,需要请自行实现.

示例如下:

item.orm = [VVOrm ormWithClass:VVMessage.class name:item.tableName database:item.db];
        
item.ftsOrm = [VVOrm ormWithFtsClass:VVMessage.class name:item.tableName database:item.ftsDb];

增删改查

使用ORM模型进行增删改查等操作.

示例如下:

    NSInteger count = [self.mobileModel count:nil];
    
    BOOL ret = [self.mobileModel increase:nil field:@"times" value:-1];
    
    NSArray *array = [self.mobileModel findAll:nil orderBy:nil limit:10 offset:0];
    
...

生成SQL子句

现在仅支持非套嵌的字典或字典数组,转换方式如下:

//where/having :
{field1:val1,field2:val2} --> field1 = "val1" AND field2 = "val2"
[{field1:val1,field2:val2},{field3:val3}] --> (field1 = "val1" AND field2 = "val2") OR (field3 = "val3")
//group by:
[filed1,field2] --> "field1","field2"
//order by
[filed1,field2] --> "field1","field2" ASC
[filed1,field2].desc --> "field1","field2" DESC

示例:

- (void)testClause
  {
    VVSelect *select =  [VVSelect new];
    select.table(@"mobiles");
    select.where(@"relative".lt(@(0.3))
                 .and(@"mobile".gte(@(1600000000)))
                 .and(@"times".gte(@(0))));
    NSLog(@"%@", select.sql);
    select.where(@{ @"city": @"西安", @"relative": @(0.3) });
    NSLog(@"%@", select.sql);
    select.where(@[@{ @"city": @"西安", @"relative": @(0.3) }, @{ @"relative": @(0.7) }]);
    NSLog(@"%@", select.sql);
    select.where(@"relative".lt(@(0.3)));
    NSLog(@"%@", select.sql);
    select.where(@"     where relative < 0.3");
    NSLog(@"%@", select.sql);
    select.groupBy(@"city");
    NSLog(@"%@", select.sql);
    select.groupBy(@[@"city", @"carrier"]);
    NSLog(@"%@", select.sql);
    select.groupBy(@" group by city carrier");
    NSLog(@"%@", select.sql);
    select.having(@"relative".lt(@(0.2)));
    NSLog(@"%@", select.sql);
    select.groupBy(nil);
    NSLog(@"%@", select.sql);
    select.orderBy(@[@"city", @"carrier"]);
    NSLog(@"%@", select.sql);
    select.orderBy(@" order by relative");
    NSLog(@"%@", select.sql);
    select.limit(10);
    NSLog(@"%@", select.sql);
    select.distinct(YES);
    NSLog(@"%@", select.sql);
}

原生语句查询

- (NSArray<NSDictionary *> *)query:(NSString *)sql;

- (NSArray *)query:(NSString *)sql clazz:(Class)clazz;

加密数据数据转换(sqlcipher 3.x->4.x)

    VVDatabase *database = [VVDatabase databaseWithPath:path flags:0 encrypt:@"XXXXX"];
    database.cipherOptions = @[
        @"pragma cipher_page_size = 4096;", ///<3.x的cipher_page_size,默认为1024
        @"pragma kdf_iter = 64000;",
        @"pragma cipher_hmac_algorithm = HMAC_SHA1;",
        @"pragma cipher_kdf_algorithm = PBKDF2_HMAC_SHA1;"
    ];

Author

Valo Lee, [email protected]

License

VVSequelize is available under the MIT license. See the LICENSE file for more info.

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pozi119 / VVSequelize

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