（4）代码及测试【利用objective-c的runtime特性，结合FMDB实现轻量级的ORM】

版权声明：本文为博主原创文章，未经博主允许不得转载。

(本ORM的源码已经上传到github上 （https://github.com/helloclq/BCSqliteORM_FMDB)，大家可以下载测试，如发现什么问题或意见，欢迎大家提出并指正，oschina上的地址为：http://git.oschina.net/BlockCheng/BCSqliteORM_FMDB )

0、测试代码及结果

根据前面的UML，我完成了基本的code，先看下测试结果：

测试代码：

int main(int argc, const char * argv[]) {
@autoreleasepool {
//build two model
ClassEntity* classeEntity = [ClassEntity new];
classeEntity.className = @"Software02";
classeEntity.classId = 1;

StudentEntity* student = [StudentEntity new];
student.age = 12;
student.score = 80;
student.classId = 1;
student.studentNum = 421125;
student.studentName = @"BlockCheng";

//init and mapping ,or open an existing database file,
BCORMHelper* helper = [[BCORMHelper alloc]initWithDatabaseName:@"test.db" enties: @[ [ClassEntity class],[StudentEntity class]]];

//insert
for (int i  = 0 ;i <  10; i ++) {
classeEntity.classId =  i % 10;
classeEntity.className = [NSString stringWithFormat:@"Class E_%d_%@",i,[NSDate date]];
[helper save:classeEntity];
}

for (int i  = 0 ;i <  100; i ++) {
student.studentNum = 421125 + i ;
student.classId = i % 10 + 1;
student.studentName = [NSString stringWithFormat:@"student_%d_%@",i,[NSDate date]];
[helper save:student];
}

//query
BCSqlParameter *queryParam  = [[BCSqlParameter  alloc] init];
queryParam.entityClass = [StudentEntity class];
queryParam.propertyArray = @[@"age",@"classId",@"score",@"studentName",@"studentNum"];
queryParam.selection = @"classId = ? and studentNum=?";
queryParam.selectionArgs = @[@1,@421125];
queryParam.orderBy = @" studentNum  asc";
id entity  = [helper queryEntityByCondition:queryParam];
NSLog(@"entity:----%@",entity);

//another way to query
entity  = [helper queryEntityByCondition:BCQueryParameterMake([StudentEntity class], @[@"age",@"classId",@"score",@"studentName",@"studentNum"], @"classId = ? and studentNum=?", @[@1,@421128], nil,@" studentNum  asc",  -1, -1)];
NSLog(@"entity:----%@",entity);

//query many models
queryParam.propertyArray = nil;
queryParam.selection = @"classId = ?";
queryParam.selectionArgs = @[@1];
NSArray* entities  = [helper queryEntitiesByCondition:queryParam];
NSLog(@"entities:----%@",entities);
//query by condition
entities  = [helper queryEntitiesByCondition:BCQueryParameterMake([ClassEntity class], nil, @"classId = ?", @[@1], nil, nil, -1, -1)];
NSLog(@"entities:----%@",entities);

//update a model
student.studentName = @"BlockCheng_Update";
[helper update:student];

//query many model by condition
entity  = [helper queryEntityByCondition:BCQueryParameterMakeSimple([StudentEntity class], nil, @"studentNum=?", @[@421138])];
NSLog(@"entity:----%@",entity);

//delete
[helper remove:entity];

//query many model by condition
entity  = [helper queryEntityByCondition:BCQueryParameterMakeSimple([StudentEntity class], nil, @"studentNum=?", @[@421138])];
NSLog(@"entity:----%@",entity);

//update many model by condition
[helper updateByCondition:BCUpdateParameterMake([StudentEntity class], @"studentName=?", @[@"new_name"], @"studentNum=?", @[@421125])];

entity  = [helper queryEntityByCondition:BCQueryParameterMakeSimple([StudentEntity class], nil, @"studentNum=?", @[@421125])];
NSLog(@"entity:----%@",entity);

//delete by condition
[helper deleteByCondition:BCDeleteParameterMake([StudentEntity class],  @"studentNum < ?", @[@421135])];

}
return 0;
}

控制台输出：

1、建表

BCORMHelper.m:412	sqlite file path:/Users/BlockCheng/Library/Application Support/test.db
BCORMHelper.m:341	add a new class:ClassEntity
BCORMHelper.m:345	execute a sql:
SSQL:::[

DROP TABLE IF EXISTS "class" ;

]
BCORMHelper.m:263	execute a sql:
SSQL:::[

CREATE TABLE 'class' ('id'  INTEGER  PRIMARY KEY  AUTOINCREMENT   NOT NULL , 'name'  TEXT   NOT NULL);

]
BCORMHelper.m:341	add a new class:StudentEntity
BCORMHelper.m:345	execute a sql:
SSQL:::[

DROP TABLE IF EXISTS "StudentEntity" ;

]
BCORMHelper.m:263	execute a sql:
SSQL:::[

CREATE TABLE 'StudentEntity' ('age'  INTEGER   NOT NULL   DEFAULT '22'  , 'name'  TEXT   NOT NULL   DEFAULT 'blockcheng'  , 'num'  INTEGER  PRIMARY KEY   NOT NULL , 'score'  REAL   NOT NULL   DEFAULT '80.0'  , 'classid'  INTEGER,  CONSTRAINT 'Software01' FOREIGN KEY ('classid')  REFERENCES 'class'('id'));

]
BCORMHelper.m:281	build table index.....
BCORMHelper.m:297	execute a sql:
SSQL:::[

CREATE INDEX idx_StudentEntity_num ON StudentEntity('num');CREATE INDEX idx_StudentEntity_classid ON StudentEntity('classid');

]

2、插入insert

BCORMHelper.m:520	save:
SSQL:::[

INSERT INTO class ( 'id','name') VALUES (:id ,:name )

]
args:{
id = 2;
name = Software02;
}

3、查询

BCORMHelper.m:598	queryEntityByCondition:
SSQL:::[

SELECT  age,  classid,  score,  name,  num  FROM StudentEntity  WHERE classid = ? and num=?  ORDER BY  num  asc

]
arg:(
1,
421125
)

4、更新：

BCORMHelper.m:822	update:
SSQL:::[

UPDATE StudentEntity SET age = :age,name = :name,num = :num,score = :score,classid = :classid  WHERE num ='421224'

]
args:{
age = 12;
classid = 10;
name = "BlockCheng_Update";
num = 421224;
score = 80;
}

5、删除：

BCORMHelper.m:971	remove:
SSQL:::[

DELETE FROM StudentEntity   WHERE num ='421138'

]

6、条件更新：

BCORMHelper.m:899	updateByCondition:
SSQL:::[

UPDATE StudentEntity SET  name=?  WHERE num=?

]
args:(
"new_name",
421125
)

7、条件删除

BCORMHelper.m:1016	deleteByCondition:
SSQL:::[

DELETE  FROM StudentEntity   WHERE num < ?

]
args:(
421135
)

从测试结果看，完全达到了前面我的预期

1、用法_建表_映射

由于本orm是基于fmdb的，故包好FMDB和相应的库是必须的！！

然后，包含本ORM头文件

#import "BCDB.h"

需要和数据库映射的实体需要实现 BCORMEntityProtocol 协议

@protocol BCORMEntityProtocol <NSObject>

@required
/**
*propertyName: databaseInfo;
**/
+(NSDictionary*)tableEntityMapping;
@optional
+(NSString*)tableName;
/**
*propertyName----- table index;
**/
+(NSArray*)tableIndexArray;

@end

例如：

@interface ClassEntity : NSObject<BCORMEntityProtocol>
@property (nonatomic,assign)NSInteger classId;
@property (nonatomic,copy)NSString* className;
@end

@implementation ClassEntity
- (NSString *)description
{
return [NSString stringWithFormat:@"[Class:id(%ld) name:(%@)]:%p",self.classId,self.className,self];
}

+(NSString*)tableName
{
return @"class";
}

+(NSDictionary*)tableEntityMapping
{
return @{ @"classId":BCSqliteTypeMakeIntPrimaryKey(@"id", YES),
@"className":BCSqliteTypeMakeText(@"name", NO)
};
}
@end

然后创建数据库或打开现有数据库即可：

BCORMHelper* helper = [[BCORMHelper alloc]initWithDatabaseName:@"test.db" enties: @[ [ClassEntity class],[StudentEntity class]]];

执行后，如果数据库不存在，便可看到建表过程，输入如：上面的【0、测试代码及结果-----1、建表】

2、insert实体到sqlite

完成【1、用法_建表_映射】后，构造一个实体插入：

ClassEntity* classeEntity = [ClassEntity new];
classeEntity.className = @"Software02";
classeEntity.classId = 1;
[helper save:classeEntity];

遍成功地插入了一条数据，或者更新了数据：结果见 上面的【0、测试代码及结果-----2、插入insert】

3、update更新实体

更新一个已存在的数据的方式为：

classeEntity.className = @"Software01";
[helper update:classeEntity];

输入为：

BCORMHelper.m:822	update:
SSQL:::[

UPDATE class SET id = :id,name = :name  WHERE id ='9'

]
args:{
id = 9;
name = Software01;
}

也可以根据条件更新：

//update many model by condition
[helper updateByCondition:BCUpdateParameterMake([StudentEntity class], @"studentName=?", @[@"new_name"], @"studentNum=?", @[@421125])];

结果见 【0、测试代码及结果-----6、条件更新：】

4、query查询一个或多个

查询可以自己构造参数：

//query
BCSqlParameter *queryParam  = [[BCSqlParameter  alloc] init];
queryParam.entityClass = [StudentEntity class];
queryParam.propertyArray = @[@"age",@"classId",@"score",@"studentName",@"studentNum"];
queryParam.selection = @"classId = ? and studentNum=?";
queryParam.selectionArgs = @[@1,@421125];
queryParam.orderBy = @" studentNum  asc";
id entity  = [helper queryEntityByCondition:queryParam];
NSLog(@"entity:----%@",entity);

也可以：

//another way to query
id entity  = [helper queryEntityByCondition:BCQueryParameterMake([StudentEntity class], @[@"age",@"classId",@"score",@"studentName",@"studentNum"], @"classId = ? and studentNum=?", @[@1,@421128], nil,@" studentNum  asc",  -1, -1)];
NSLog(@"entity:----%@",entity);

输出见【0、测试代码及结果-----3、查询】

5、delete删除实体

可以直接remove一个已存在的实体：

//delete
[helper remove:entity];

或者根据条件来删除：

//delete by condition
[helper deleteByCondition:BCDeleteParameterMake([StudentEntity class],  @"studentNum < ?", @[@421135])];

输出见【0、测试代码及结果-----7、条件删除】

6、结束语

本ORM的源码已经上传到github上 （https://github.com/helloclq/BCSqliteORM_FMDB)，大家可以下载测试，如发现什么问题或意见，欢迎大家提出并指正，

稍后，我也会传一份到oschina的git上，后面我持续更新该orm源码。

版权声明：本文为博主原创文章，未经博主允许不得转载。