eos智能合约开发-08 第二个智能合约操作数据库

准备�
上一小节， 我们实现了最简单的hello 智能合约，那么依然我们来使用uesr 用户来操作这个合约来操作eos的数据库

编译执行合约shell脚本：start.sh
由于脚本比较粗糙，并未对执行结果进行判断

#!/bin/bash
echo "clean"
rm -rf jianshu.table.token.was* jianshu.table.token.abi 
sleep 1

eosiocpp -o jianshu.table.token.wast jianshu.table.token.cpp
echo "   BUILD  *.wast success ! "
eosiocpp -g jianshu.table.token.abi jianshu.table.token.cpp
echo "  BUILD  *.abi success ! "

echo "  contract * * * * ! "
sleep 1
cleos set contract user ../jianshu.table.token/

echo "  RUN contract * * * * ! "
sleep 1
cleos push action user create '{"account":"9527","id":"511x2x199103051xxx", "name":"user", "address":"chengdu"}' -p user
sleep 1
cleos get table user user people

jianshu.table.token.hpp

/**
* @file
* @author Aries
*/
#include 
#include 
using namespace eosio;

namespace yykik {
    using std::string;
    class tablepeople : public contract {
        public:
            using contract::contract;
            tablepeople(account_name self) : contract(self) {}
        /// @abi action
        void create(const account_name account, uint64_t id, string name, string address);
        /// @abi action
        void remove(const account_name account );
        private:
            /// @abi table people i64
            struct people {
                uint64_t    id;     //用户唯一识别Id
                account_name account;//用户账户名
                string      name;   //用户名
                string      address;//用户地址
                /// Define the people primary key
             /// 主键索引
                uint64_t primary_key() const { return account; }
                //用户id索引
                uint64_t get_id() const { return id; }
                
                /// Serialization people
                EOSLIB_SERIALIZE(people, (account)(id)(name)(address))
            };
            /// 默认通过主键索引，使用indexed_by，可以通过自定义函数进行索引
            typedef eosio::multi_index>
            > people_index;
    };
}

jianshu.table.token.cpp

#include "jianshu.table.token.hpp"
namespace yykik {
    void tablepeople::create(const account_name account, uint64_t id, string name, string address)
    {   
        // 获取授权，如果没有授权，Action调用会中止，事务会回滚
        require_auth(_self);
        //eosio_assert(account==N(user),"错误：其他账户没有权限调用该方法");
        //校验参数
        eosio_assert(address.size() < 36, "错误: 地址不允许超过36字节");
        people_index peopmul (_self, _self);
        peopmul.emplace(_self, [&](auto &obj){
            obj.account = account;
            obj.id = id;
            obj.name = name;
            obj.address = address;
        });
    }

    void tablepeople::remove(const account_name account)
    {
        require_auth(account);
        people_index peopmul (_self, _self);
        auto peoperiter = peopmul.find(account);
        eosio_assert(peoperiter != peopmul.end(), "people account not fount!");
        peopmul.erase(peoperiter);
    }
    
}

EOSIO_ABI( yykik::tablepeople, (create)(remove) )

操作如下：

查看数据库数据：
 cleos get table user user people
{
  "rows": [],
  "more": false
}


执行合约：
cleos push action user create '{"account":"user","id":"51132419910305xxxx", "name":"user", "address":"chengdu"}' -p user
executed transaction: 330e618629480a5115802577e389da34dc81b37aa15da35defc2004f3dd8178a  128 bytes  14276 us
#          user <= user::create                 {"account":"user","id":"51132419910305xxxx","name":"user","address":"chengdu"}
warning: transaction executed locally, but may not be confirmed by the network yet    ] 

查看数据库数据：
cleos get table user user people
{
  "rows": [{
      "id": "15426359243929812992",
      "account": ".wgdhdn4n4wcj",
      "name": "user",
      "address": "chengdu"
    }
  ],
  "more": false
}

执行智能合约：
cleos push action user create '{"account":"aries","id":"51132419910305xxxx", "name":"user", "address":"chengdu"}' -p user
executed transaction: 6964fb0d293400ff8593c9590d4126162b142c64a300fe05024e23c0bd2a2490  128 bytes  1341 us
#          user <= user::create                 {"account":"aries","id":"51132419910305xxxx","name":"user","address":"chengdu"}
warning: transaction executed locally, but may not be confirmed by the network yet    ] 

查看数据库数据：
cleos get table user user people
{
  "rows": [{
      "id": "3881166094886502400",
      "account": ".wgdhdn4n4wcj",
      "name": "user",
      "address": "chengdu"
    },{
      "id": "15426359243929812992",
      "account": ".wgdhdn4n4wcj",
      "name": "user",
      "address": "chengdu"
    }
  ],
  "more": false
}