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EasyDataKit

(English Introduction)

EasyDataKit 可以使数据存储、更新、查询和删除操作变得非常简单。它基于 FMDB 封装，支持了类似 ORM 的方式进行数据库操作。特别适用于获取网络请求后直接对 JSON 数据的持久化等操作。

特征

  • 类 ORM 接口

  • 自动创建库和表，支持表新增字段的修改

  • 支持 where 查询语句

  • 自动事务提升插入效率

安装

pod 'EasyDataKit'

使用

假设你通过网络请求获取到了数据：

{
    "data": {
        "id": "56d177a27cb3331100465f72",
        "messagePrefix": "饭否每日精选",
        "content": "饭否每日精选",
        "topicId": 1345,
        "briefIntro": "饭否是国内著名的小众轻博客社区，氛围独特，清新自由。关注饭否每日精选，看看尘嚣之外，大家谈论什么。",
        "keywords": "饭否 精选 短博客 社区",
        "timeForRank": "2016-02-27T11:06:30.731Z",
        "lastMessagePostTime": "2016-11-06T02:42:52.111Z",
        "topicPublishDate": "2016-02-26T16:00:00.000Z",
        "createdAt": "2016-02-27T10:17:06.295Z",
        "updatedAt": "2016-11-01T04:30:08.973Z",
        "subscribersCount": 1207100,
        "subscribedStatusRawValue": 1,
        "subscribedAt": "2016-10-18T09:57:24.424Z",
        "rectanglePicture": {
            "thumbnailUrl": "https://cdn.ruguoapp.com/o_1ach3c6o011j91ljjtmdhlhnffo.jpg?imageView2/1/w/120/h/180",
            "middlePicUrl": "https://cdn.ruguoapp.com/o_1ach3c6o011j91ljjtmdhlhnffo.jpg?imageView2/1/w/200/h/300",
            "picUrl": "https://cdn.ruguoapp.com/o_1ach3c6o011j91ljjtmdhlhnffo.jpg?imageView2/0/h/1000",
            "format": "png"
        },
        "squarePicture": {
            "thumbnailUrl": "https://cdn.ruguoapp.com/o_1ach6nm599m94re1gvj14r71jaso.jpg?imageView2/0/w/120/h/120",
            "middlePicUrl": "https://cdn.ruguoapp.com/o_1ach6nm599m94re1gvj14r71jaso.jpg?imageView2/0/w/300/h/300",
            "picUrl": "https://cdn.ruguoapp.com/o_1ach6nm599m94re1gvj14r71jaso.jpg?imageView2/0/h/1000",
            "format": "png"
        },
        "pictureUrl": "https://cdn.ruguoapp.com/o_1ach3c6o011j91ljjtmdhlhnffo.jpg?imageView2/1/w/200/h/300",
        "thumbnailUrl": "https://cdn.ruguoapp.com/o_1ach6nm599m94re1gvj14r71jaso.jpg?imageView2/0/w/300/h/300"
    }
}

你可将这段 JSON String 转换成 Dictionary 或 Array:

NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
NSDictionary *subscribe = dictionary[@"data"];

存储

接着便可使用 EasyDataKit 的 API 进行存储：

EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subscribeEntity saveData:subscribe primaryColumn:@"id" relationShip:nil indexes:nil];

如果你不想使用 id 作为主键，你可以传 nil 让 EasyDataKit 自动生成每条记录的 rowId 作为主键列：

EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subscribeEntity saveData:subscribe primaryColumn:nil relationShip:nil indexes:nil];

你可以手动为数据添加列，实现满足业务的需求：

NSMutableDictionary *subcribeInfo = [[NSMutableDictionary alloc] initWithDictionary:subscribe];
[subcribeInfo setObject:@1 forKey:@"isSubcribed"];
EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subscribeEntity saveData:subcribeInfo primaryColumn:@"id" relationShip:nil];

如果你想让某纪录关联其它对象，可以将对象存储后返回的 id 作为 value，key 是该纪录原本对应该对象的字段，这相当于用 id 这个值去替换原本字段对应的对象，从而达到拆分的目的：

id rowId = [rectanglePictureEntity saveData:subscribe[@"rectanglePicture"] primaryColumn:nil relationShip:nil indexes:nil];

EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subscribeEntity saveData:subscribe primaryColumn:@"id" relationShip:@{@"rectanglePicture": rowId} indexes:nil];

存储索引：

NSDictionary *subcribeInfo = [[NSDictionary alloc] initWithDictionary:subscribe];
EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:@"TestIndex"];
[subscribeEntity saveData:subcribeInfo primaryColumn:nil relationShip:nil indexes:@[@[@"topicId"], @[@"content", @"messagePrefix"]]];

查询

通过 id 查询:

// select by id
EDKEntity *entity = [[EDKEntity alloc] initWithTableName:@"messages" dbName:nil];
id object = [entity queryByPrimaryKey:@"581d2fdb36a4471100e311d6" withColumns:@[@"topicId", @"commentCount", @"topic"]];
NSLog(@"%@", object);

// relationship query
EDKEntity *topicEntity = [[EDKEntity alloc] initWithTableName:@"topics" dbName:nil];
id topic = [topicEntity queryByPrimaryKey:object[@"topic"] withColumns:nil];
NSLog(@"%@",topic);

通过 where 条件查询:

NSArray *objects = [entity queryWithColumns:nil where:@"WHERE commentCount < ? and read = ?" arguments:@[@20, @1]];
NSLog(@"%@", objects);

查询全部纪录:
```objc
NSArray *objects = [entity queryAll];
NSLog(@"%@", objects);

查询嵌套对象并将其转换为 Dictionary 或 Array:

EDKEntity *subcribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
// select by id
id subcribe = [subcribeEntity queryByPrimaryKey:@"56d177a27cb3331100465f72" withColumns:@[@"squarePicture"]];
// subcribe is a json string
NSData *data = [subcribe[@"squarePicture"] dataUsingEncoding:NSUTF8StringEncoding];
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
NSLog(@"JSONDict: %@", jsonDict);

更新

普通更新:

EDKEntity *entity = [[EDKEntity alloc] initWithTableName:@"messages" dbName:nil];
[entity updateByPrimaryKey:@"5805905a319a9c1200833660" set:@{@"read": @"0", @"commentCount": @99}];
[entity updateWithSet:@{@"messageId": @"2333333"} where:@"WHERE commentCount > ?" arguments:@[@50]];

使用字典更新嵌套对象:

NSDictionary *square = @{@"lisp": @"blablabla..."};
EDKEntity *subcribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subcribeEntity updateByPrimaryKey:@"56d177a27cb3331100465f72" set:@{@"squarePicture": square}];

删除

EDKEntity *entity = [[EDKEntity alloc] initWithTableName:@"messages" dbName:nil];
// delete by id
[entity deleteByPrimaryKey:@"5805905a319a9c1200833660"];
// delete by where
[entity deleteWithWhere:@"WHERE popularity = ?" arguments:@[@"93"]];
// delete all
[entity deleteAll];

更详尽的使用请参考 Example 中的 test

许可证

EasyDataKit 采用 MIT 许可证，详情见 LICENSE 文件。

English

EasyDataKit makes data store, update, query and delete easy.It is based on FMDB, and support an ORM way to deal with db.

Features

  • like ORM interface.

  • auto create db and table, also alter table

  • support where condition query

  • auto transaction improve insert effect

Installation

pod 'EasyDataKit'

Usage

Assume you get a response from network such as:

{
    "data": {
        "id": "56d177a27cb3331100465f72",
        "messagePrefix": "饭否每日精选",
        "content": "饭否每日精选",
        "topicId": 1345,
        "briefIntro": "饭否是国内著名的小众轻博客社区，氛围独特，清新自由。关注饭否每日精选，看看尘嚣之外，大家谈论什么。",
        "keywords": "饭否 精选 短博客 社区",
        "timeForRank": "2016-02-27T11:06:30.731Z",
        "lastMessagePostTime": "2016-11-06T02:42:52.111Z",
        "topicPublishDate": "2016-02-26T16:00:00.000Z",
        "createdAt": "2016-02-27T10:17:06.295Z",
        "updatedAt": "2016-11-01T04:30:08.973Z",
        "subscribersCount": 1207100,
        "subscribedStatusRawValue": 1,
        "subscribedAt": "2016-10-18T09:57:24.424Z",
        "rectanglePicture": {
            "thumbnailUrl": "https://cdn.ruguoapp.com/o_1ach3c6o011j91ljjtmdhlhnffo.jpg?imageView2/1/w/120/h/180",
            "middlePicUrl": "https://cdn.ruguoapp.com/o_1ach3c6o011j91ljjtmdhlhnffo.jpg?imageView2/1/w/200/h/300",
            "picUrl": "https://cdn.ruguoapp.com/o_1ach3c6o011j91ljjtmdhlhnffo.jpg?imageView2/0/h/1000",
            "format": "png"
        },
        "squarePicture": {
            "thumbnailUrl": "https://cdn.ruguoapp.com/o_1ach6nm599m94re1gvj14r71jaso.jpg?imageView2/0/w/120/h/120",
            "middlePicUrl": "https://cdn.ruguoapp.com/o_1ach6nm599m94re1gvj14r71jaso.jpg?imageView2/0/w/300/h/300",
            "picUrl": "https://cdn.ruguoapp.com/o_1ach6nm599m94re1gvj14r71jaso.jpg?imageView2/0/h/1000",
            "format": "png"
        },
        "pictureUrl": "https://cdn.ruguoapp.com/o_1ach3c6o011j91ljjtmdhlhnffo.jpg?imageView2/1/w/200/h/300",
        "thumbnailUrl": "https://cdn.ruguoapp.com/o_1ach6nm599m94re1gvj14r71jaso.jpg?imageView2/0/w/300/h/300"
    }
}

You can convert it to Dictionary or Array

NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
NSDictionary *subscribe = dictionary[@"data"];

Store

Then you can call EasyDataKit method to store:

EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subscribeEntity saveData:subscribe primaryColumn:@"id" relationShip:nil indexes:nil];

If you don't want to use "id" as primary column, you can pass nil to use rowId as primary column:

EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subscribeEntity saveData:subscribe primaryColumn:nil relationShip:nil indexes:nil];

If you want to add a column manually:

NSMutableDictionary *subcribeInfo = [[NSMutableDictionary alloc] initWithDictionary:subscribe];
[subcribeInfo setObject:@1 forKey:@"isSubcribed"];
EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subscribeEntity saveData:subcribeInfo primaryColumn:@"id" relationShip:nil];

If you have a relation with other object, notice the related field must be in the storage's data, it likes replace a field's value:

id rowId = [rectanglePictureEntity saveData:subscribe[@"rectanglePicture"] primaryColumn:nil relationShip:nil indexes:nil];

EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subscribeEntity saveData:subscribe primaryColumn:@"id" relationShip:@{@"rectanglePicture": rowId} indexes:nil];

Store Index:

NSDictionary *subcribeInfo = [[NSDictionary alloc] initWithDictionary:subscribe];
EDKEntity *subscribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:@"TestIndex"];
[subscribeEntity saveData:subcribeInfo primaryColumn:nil relationShip:nil indexes:@[@[@"topicId"], @[@"content", @"messagePrefix"]]];

Query

Query by id:

// select by id
EDKEntity *entity = [[EDKEntity alloc] initWithTableName:@"messages" dbName:nil];
id object = [entity queryByPrimaryKey:@"581d2fdb36a4471100e311d6" withColumns:@[@"topicId", @"commentCount", @"topic"]];
NSLog(@"%@", object);

// relationship query
EDKEntity *topicEntity = [[EDKEntity alloc] initWithTableName:@"topics" dbName:nil];
id topic = [topicEntity queryByPrimaryKey:object[@"topic"] withColumns:nil];
NSLog(@"%@",topic);

Query by where:

NSArray *objects = [entity queryWithColumns:nil where:@"WHERE commentCount < ? and read = ?" arguments:@[@20, @1]];
NSLog(@"%@", objects);

Query all:
```objc
NSArray *objects = [entity queryAll];
NSLog(@"%@", objects);

Query a nest object then convert it to Dictionary or Array:

EDKEntity *subcribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
// select by id
id subcribe = [subcribeEntity queryByPrimaryKey:@"56d177a27cb3331100465f72" withColumns:@[@"squarePicture"]];
// subcribe is a json string
NSData *data = [subcribe[@"squarePicture"] dataUsingEncoding:NSUTF8StringEncoding];
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
NSLog(@"JSONDict: %@", jsonDict);

Update

Normal update:

EDKEntity *entity = [[EDKEntity alloc] initWithTableName:@"messages" dbName:nil];
[entity updateByPrimaryKey:@"5805905a319a9c1200833660" set:@{@"read": @"0", @"commentCount": @99}];
[entity updateWithSet:@{@"messageId": @"2333333"} where:@"WHERE commentCount > ?" arguments:@[@50]];

Update with dictionary:

NSDictionary *square = @{@"lisp": @"blablabla..."};
EDKEntity *subcribeEntity = [[EDKEntity alloc] initWithTableName:@"subcribes" dbName:nil];
[subcribeEntity updateByPrimaryKey:@"56d177a27cb3331100465f72" set:@{@"squarePicture": square}];

Delete

EDKEntity *entity = [[EDKEntity alloc] initWithTableName:@"messages" dbName:nil];
// delete by id
[entity deleteByPrimaryKey:@"5805905a319a9c1200833660"];
// delete by where
[entity deleteWithWhere:@"WHERE popularity = ?" arguments:@[@"93"]];
// delete all
[entity deleteAll];

License

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

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Super Easy Store Fetch Update And Delete Data With SQLite.

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