智能合约的编写增删改查

没有什么参考价值

Table.sol内容

pragma solidity ^0.4.24;contract TableFactory {/*** @brief 打开表，返回Table合约地址* @param tableName 表的名称* @return 返回Table的地址，当表不存在时，将会返回空地址即address(0x0)*/function openTable(string tableName) public constant returns (Table);/*** @brief 创建表，返回是否成功* @param tableName 表的名称* @param key 表的主键名* @param valueFields 表的字段名，多个字段名以英文逗号分隔* @return 返回错误码，成功为0，错误则为负数*/function createTable(string tableName,int key,string valueFields) public         returns(int);
}// 查询条件
contract Condition {//等于function EQ(string, int) public;function EQ(string, string) public;//不等于function NE(string, int) public;function NE(string, string)  public;//大于function GT(string, int) public;
//大于或等于function GE(string, int) public;//小于function LT(string, int) public;
//小于或等于function LE(string, int) public;//限制返回记录条数function limit(int) public;function limit(int, int) public;
}// 单条数据记录contract Entry {function getInt(string) public constant returns(int);function getAddress(string) public constant returns(address);function getBytes64(string) public constant returns(byte[64]);function getBytes32(string) public constant returns(bytes32);function getString(string) public constant returns(string);function set(string, int) public;function set(string, string) public;function set(string, address) public;
}// 数据记录集contract Entries {function get(int) public constant returns(Entry);function size() public constant returns(int);}// Table主类
contract Table {/*** @brief 查询接口* @param key 查询主键值* @param cond 查询条件* @return Entries合约地址，合约地址一定存在*/function select(int key, Condition cond) public constant returns(Entries);/*** @brief 插入接口* @param key 插入主键值* @param entry 插入字段值* @return 插入影响的行数*/function insert(int key, Entry entry) public returns(int);/*** @brief 更新接口* @param key 更新主键值* @param entry 更新字段值* @param cond 更新条件* @return 更新影响的行数*/function update(int key, Entry entry, Condition cond) public returns(int);/*** @brief 删除接口* @param key 删除的主键值* @param cond 删除条件* @return 删除影响的行数*/function remove(int key, Condition cond) public returns(int);function newEntry() public constant returns(Entry);function newCondition() public constant returns(Condition);
}

任务分配表合约的内容：

pragma solidity >=0.6.10 <0.8.20;pragma experimental ABIEncoderV2;import "./Table.sol";contract TableTest {event CreateResult(int256 count);event InsertResult(int256 count);event UpdateResult(int256 count);event RemoveResult(int256 count);TableFactory tableFactory;string constant TABLE_NAME = "task";constructor() public {tableFactory = TableFactory(0x1001); //The fixed address is 0x1001 for TableFactory// the parameters of createTable are tableName,keyField,"vlaueFiled1,vlaueFiled2,vlaueFiled3,..."tableFactory.createTable(TABLE_NAME, "id", "employer_id,task_desc,employee_id,task_price,task_status");}//新建一个任务表 表中内容：主键为任务id 任务发布者ID 任务描述 任务接受者ID 任务成交金额 任务状态//select recordsfunction select(int memory id) public viewreturns (int256[] memory,int256[] memory, string[] memory,int256[] memory, int256[] memory,int[]memory){Table table = tableFactory.openTable(TABLE_NAME);Condition condition = table.newCondition();Entries entries = table.select(id, condition);//返回任务idint256[] memory id_list = new int256[](uint256(entries.size()));//返回任务发布者IDint256[] memory employer_id_list = new int256[](uint256(entries.size()));//返回任务内容string[] memory task_desc_list = new string[](uint256(entries.size()));//返回任务接受者IDint256[] memory employee_id_list = new int256[](uint256(entries.size()));//返回任务成交金额int256[] memory task_price_list = new int256[](uint256(entries.size()));//返回任务状态int256[] memory task_status_list = new int256[](uint256(entries.size()));for (int256 i = 0; i < entries.size(); ++i) {Entry entry = entries.get(i);id_list[uint256(i)] = entry.getInt("id");employer_id_list[uint256(i)] = entry.getInt("employer_id");task_desc_list[uint256(i)] = entry.getString("task_desc");employee_id_list[uint256(i)] = entry.getInt("employee_id");task_price_list[uint256(i)] = entry.getInt("task_price");task_status_list[uint256(i)] = entry.getInt("task_status");}return (id_list,employer_id_list,task_desc_list,employee_id_list,task_price_list,task_status_list);}//插入任务的记录 根据任务的idfunction insert(int256 id,int256 employer_id, string memory task_desc,int256 employee_id, int256 task_price,int task_status)public returns (int256){Table table = tableFactory.openTable(TABLE_NAME);Entry entry = table.newEntry();entry.set("id", id);entry.set("employer_id", employer_id);entry.set("task_desc", task_desc);entry.set("employee_id", employee_id);entry.set("task_price", task_price);entry.set("task_status", task_status);int256 count = table.insert(id, entry);emit InsertResult(count);return count;}//update recordsfunction update(int256 id,int task_status)public returns (int256){Table table = tableFactory.openTable(TABLE_NAME);Entry entry = table.newEntry();//entry.set("task_desc", task_desc);//更新任务的内容//entry.set("task_price", task_price);//更改任务的奖励entry.set("task_status", task_status);//更新任务的状态Condition condition = table.newCondition();condition.EQ("id", id);//根据任务的id进行更新int256 count = table.update(id,task_status);emit UpdateResult(count);return count;}//删除任务的记录信息function remove(int256 id) public returns (int256) {Table table = tableFactory.openTable(TABLE_NAME);Condition condition = table.newCondition();condition.EQ("id", id);int256 count = table.remove(id, condition);emit RemoveResult(count);return count;}}

mysql数据库中表的信息：

CREATE TABLE `task`  (`id` bigint(0) NOT NULL COMMENT '任务ID',`category_id` bigint(0) NULL DEFAULT NULL COMMENT '任务分类ID',`employer_id` bigint(0) NULL DEFAULT NULL COMMENT '任务发布者ID',`task_title` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '任务标题',`task_profile` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '任务简介',`task_desc` text CHARACTER SET utf8 COLLATE utf8_general_ci NULL COMMENT '任务描述',`fees_low` double NULL DEFAULT NULL COMMENT '最低预算奖励',`fees_high` double NULL DEFAULT NULL COMMENT '最高预算奖励',`fees_file` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '任务附件地址',`filename` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '附件文件名称',`employee_id` bigint(0) NULL DEFAULT NULL COMMENT '完成任务任务接受者ID',`task_price` double NULL DEFAULT NULL COMMENT '任务成交奖励',`task_status` tinyint(0) NULL DEFAULT NULL COMMENT '任务状态',`close_time` timestamp(0) NULL DEFAULT NULL COMMENT '成交时间',`bid_time` timestamp(0) NULL DEFAULT NULL COMMENT '任务申请成功时间',`create_time` timestamp(0) NULL DEFAULT NULL COMMENT '创建时间',PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

今天先写到这里明天再看

添加了hash匿名性之后:

/*** ClassName:qvkuail* Package:PACKAGE_NAME** @Data:2023/05/08 16:23* @Author:灿灿睡醒了*/
public class qvkuail {pragma solidity >=0.6.10 <0.8.20;pragma experimental ABIEncoderV2;import"./Table.sol";
//在Solidity代码中添加SHA256库，这将使您能够使用SHA256哈希函数对主键id进行哈希处理import"./SHA256.sol";  // 添加SHA256库contract TableTest{event CreateResult (int256 count);event InsertResult (int256 count);event UpdateResult (int256 count);event RemoveResult (int256 count);TableFactory tableFactory;string constant TABLE_NAME = "task";constructor() public {tableFactory = TableFactory(0x1001); //The fixed address is 0x1001 for TableFactory// the parameters of createTable are tableName,keyField,"vlaueFiled1,vlaueFiled2,vlaueFiled3,..."tableFactory.createTable(TABLE_NAME, "id", "employer_id,task_desc,employee_id,task_price,task_status");}//新建一个任务表 表中内容：主键为任务id 任务发布者ID 任务描述 任务接受者ID 任务成交金额 任务状态//select recordsfunction select ( int id)public view
//        function select(bytes32 id_hash) public viewreturns(int256[]memory, int256[]memory, string[]memory, int256[]memory, int256[]memory,int[] memory){Table table = tableFactory.openTable(TABLE_NAME);Condition condition = table.newCondition();//Entries entries = table.select(id_hash, condition);  // 使用哈希值而不是原始id查询表Entries entries = table.select(id, condition);//返回任务idint256[] memory id_list = new int256[] (uint256(entries.size()));//返回任务发布者IDint256[] memory employer_id_list = new int256[] (uint256(entries.size()));//返回任务内容string[] memory task_desc_list = new string[] (uint256(entries.size()));//返回任务接受者IDint256[] memory employee_id_list = new int256[] (uint256(entries.size()));//返回任务成交金额int256[] memory task_price_list = new int256[] (uint256(entries.size()));//返回任务状态int256[] memory task_status_list = new int256[] (uint256(entries.size()));for (int256 i = 0; i < entries.size(); ++i) {Entry entry = entries.get(i);//bytes32 id_hash_temp = bytes32(entry.getInt("id"));//int256 id = int256(id_hash_temp);  // 将哈希值转换为原始id//id_list[uint256(i)] = id;id_list[uint256(i)] = entry.getInt("id");employer_id_list[uint256(i)] = entry.getInt("employer_id");task_desc_list[uint256(i)] = entry.getString("task_desc");employee_id_list[uint256(i)] = entry.getInt("employee_id");task_price_list[uint256(i)] = entry.getInt("task_price");task_status_list[uint256(i)] = entry.getInt("task_status");}return (id_list,employer_id_list, task_desc_list, employee_id_list, task_price_list, task_status_list);}//插入任务的记录 根据任务的idfunction insert (int256 id, int256 employer_id, string task_desc, int256 employee_id, int256 task_price,int task_status)
public returns(int256){Table table = tableFactory.openTable(TABLE_NAME);Entry entry = table.newEntry();//bytes32 id_hash = SHA256.hash(bytes32(id));  // 将id哈希化//entry.set("id", int256(id_hash));  // 将哈希后的id插入到表中entry.set("id", id);entry.set("employer_id", employer_id);entry.set("task_desc", task_desc);entry.set("employee_id", employee_id);entry.set("task_price", task_price);entry.set("task_status", task_status);int256 count = table.insert(id, entry);//int256 count = table.insert(id_hash, entry);  // 将哈希后的id插入到表中emit InsertResult (count);return count;}//更新任务的交易记录function update (int256 id,int task_status)
public returns(int256){Table table = tableFactory.openTable(TABLE_NAME);Entry entry = table.newEntry();//entry.set("task_desc", task_desc);//更新任务的内容//entry.set("task_price", task_price);//更改任务的奖励entry.set("task_status", task_status);//更新任务的状态Condition condition = table.newCondition();condition.EQ("id", id);//根据任务的id进行更新int256 count = table.update(id, task_status);emit UpdateResult (count);return count;}//删除任务的记录信息function remove (int256 id) public returns(int256) {Table table = tableFactory.openTable(TABLE_NAME);Condition condition = table.newCondition();condition.EQ("id", id);int256 count = table.remove(id, condition);emit RemoveResult (count);return count;}}
}

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