{"id":5281,"date":"2021-05-30T00:34:32","date_gmt":"2021-05-29T16:34:32","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=5281"},"modified":"2021-05-30T00:34:32","modified_gmt":"2021-05-29T16:34:32","slug":"c-orm%e6%a1%86%e6%9e%b6sqlpp11%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/5281","title":{"rendered":"C++ ORM\u6846\u67b6:SQLPP11\u6559\u7a0b"},"content":{"rendered":"

\u539f\u6587\u5730\u5740<\/a><\/p>\n

 <\/p>\n

linyilong3 2019-09-16 09:30:33 2212 \u6536\u85cf 3
\n\u5206\u7c7b\u4e13\u680f\uff1a C++ \u6587\u7ae0\u6807\u7b7e\uff1a C++ \u6570\u636e\u5e93 ORM
\n\u7248\u6743
\n\u6b22\u8fce\u6280\u672f\u4ea4\u6d41\u548c\u5e2e\u52a9\uff0c\u63d0\u4f9bIT\u76f8\u5173\u670d\u52a1\uff0c\u5982\u679c\u6709\u9700\u8981\uff0c\u8bf7\u8054\u7cfb\u535a\u4e3bQQ: 503587937<\/p>\n

\u6587\u7ae0\u76ee\u5f55
\n\u4e0b\u8f7d\u5b89\u88c5
\n\u751f\u6210\u6e90\u7801\u6587\u4ef6
\n\u7c7b\u578b\u5bf9\u5e94
\n\u7b80\u5355\u7684\u589e\u5220\u67e5\u6539
\n\u9879\u76ee\u91cc\u9762\u76ee\u524d\u8fd8\u662f\u662f\u7528\u624b\u5199\u7684SQL\u8bed\u53e5\uff0c\u5f88\u9ebb\u70e6\uff0c\u4e5f\u5f88\u5bb9\u6613\u51fa\u95ee\u9898\uff0c\u5f88\u65e9\u4ee5\u524d\u5c31\u60f3\u8fc7\u4f7f\u7528C++\u7684ORM\u6846\u67b6\uff0c\u5f53\u65f6\u4e00\u76f4\u6ca1\u627e\u5230\u5408\u9002\u7684\uff0c\u4e00\u76f4\u5c31\u6401\u7f6e\u7740\u3002\u5982\u679c\u6ca1\u627e\u5230\u5408\u9002\u7684\u6846\u67b6\uff0c\u5c31\u4f1a\u81ea\u5df1\u624b\u64b8\u4e00\u4e2a\u4e86\u3002
\n\u4eca\u5929\u7a81\u7136\u53d1\u73b0\u4e86\u4e00\u4e2a\u633a\u597d\u7528\u7684C++ ORM\u6846\u67b6\uff0cSQLPP11\uff0c\u6bd4\u6211\u5f53\u65f6\u7684\u60f3\u6cd5\u8fd8\u597d\uff0c\u6bd4\u5982\u67e5\u8be2\u8bed\u53e5\uff0c\u5f53\u65f6\u6211\u7684\u60f3\u6cd5\u662f<\/p>\n

select(tablename).where(“i < 7”).and(“j > 8”).or(“x < 2”)
\nSQLPP11\u7684\u5219\u662f:<\/p>\n

select(foo.name, foo.hasFun)
\n.from(foo)
\n.where(foo.id > 17 and foo.name.like(“%bar%”))
\n\u6bd4\u8d77\u5355\u7eaf\u5730\u4f7f\u7528\u5b57\u7b26\u4e32\uff0c\u8be5\u65b9\u6cd5\u53ef\u4ee5\u6709\u66f4\u597d\u7684\u5b89\u5168\u6027\u548c\u66f4\u7b80\u5355\u7684\u4ee3\u7801\u63d0\u793a<\/p>\n

\u4e0b\u8f7d\u5b89\u88c5
\n\u6e90\u7801\u7684\u5730\u5740\u5728 https:\/\/github.com\/rbock\/sqlpp11\uff0c\u53ef\u4ee5\u81ea\u884c\u7f16\u8bd1\uff0c\u4e5f\u53ef\u4ee5\u7528VCPKG\u4e0b\u8f7d\uff0c\u63a8\u4ecb\u4f7f\u7528VCPKG<\/p>\n

\u5728windows\u4e0b\u6e90\u7801\u5efa\u8bae\u4f7f\u7528vcpkg\u4e0b\u8f7d<\/p>\n

vcpkg install sqlpp11:x64-windows
\nvcpkg install sqlpp11-connector-sqlite3:x64-windows
\n\u793a\u4f8b\u6559\u7a0b\u5747\u4f7f\u7528sqlite3\u6570\u636e\u5e93, VS2015\u7f16\u8bd1
\n\u9700\u8981\u5b89\u88c5python<\/p>\n

\u751f\u6210\u6e90\u7801\u6587\u4ef6
\n\u521b\u5efa\u4e00\u4e2a\u8868\uff0c\u5e76\u4e14\u5c06\u8be5SQL\u8bed\u53e5\u4fdd\u5b58\u4e3astudent.sql<\/p>\n

“`
\nCREATE TABLE “Student” (
\n“name” TEXT,
\n“age” INTEGER
\n);
\n“`
\n\u5728vcpkg\u7684 installed\\x64-windows\\scripts \u76ee\u5f55\u4e0b\uff0c\u6709\u4e00\u4e2asqlpp11-ddl2cpp\u7684\u811a\u672c\uff0c\u8be5\u811a\u672c\u8d1f\u8d23\u628aSQL\u7684\u8bed\u53e5\u8f6c\u6362\u6210cpp\u7684\u7ed3\u6784\uff0c\u8fd0\u884c\u5982\u4e0b:<\/p>\n

python sqlpp11-ddl2cpp Student.sql .\/Student TestProject
\n\u5728\u5f53\u524d\u76ee\u5f55\u4e0b\u5c31\u4f1a\u4ea7\u751f\u4e00\u4e2aStudent.h\u7684\u6587\u4ef6\uff0c\u6253\u5f00\u540e\u53ef\u4ee5\u770b\u5230\uff0c\u5c31\u662f\u8be5\u6570\u636e\u5e93\u7684C++\u7684\u7ed3\u6784\u4e86<\/p>\n

\u7c7b\u578b\u5bf9\u5e94
\nSQLITE\u7c7b\u578b C++\u91cc\u9762\u7684\u7c7b\u578b
\nDateTime(time_point) std::chrono::system_clock
\nText std::string
\nInteger int64
\nno value void
\nbool bool
\nblob std::vector < std::uint8_t >
\n\u7b80\u5355\u7684\u589e\u5220\u67e5\u6539
\n#include “sqlpp11\/sqlpp11.h”
\n#include “sqlpp11\/sqlite3\/sqlite3.h”
\n#include “Student.h”
\n#include <sstream>
\n#include <stdlib.h>
\nnamespace sql = sqlpp::sqlite3;
\nint main(void)
\n{
\nsql::connection_config config;
\nconfig.path_to_database = “:memory:”;
\nconfig.flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
\nconfig.debug = false;<\/p>\n

try
\n{
\nsql::connection db(config);<\/p>\n

TestProject::Student stu{};<\/p>\n

db.execute(R”(CREATE TABLE “Student” (“name” TEXT,”age” INTEGER))”);
\n\/\/ \u5355\u72ec\u63d2\u5165\u4e00\u884c<\/p>\n

db(insert_into(stu).set(stu.age = 12, stu.name = “one”));
\n\/\/ \u63d2\u5165\u591a\u884c
\nauto multi_insert = insert_into(stu).columns(stu.age, stu.name);<\/p>\n

for (int i = 0; i < 10; i++)
\n{
\nstd::ostringstream ostr;
\nostr << “linyiong” << i;
\nmulti_insert.values.add(stu.age = i, stu.name = ostr.str());
\n}
\ndb(multi_insert);<\/p>\n

\/\/ \u5220\u9664
\ndb(remove_from(stu).where(stu.age==12));<\/p>\n

\/\/ \u67e5\u8be2
\nfor (const auto& row : db(select(stu.name, stu.age)
\n.from(stu)
\n.where(stu.age > 1)))
\n{
\nstd::cout << row.name << “:” << row.age << std::endl;
\n}
\n\/\/ \u66f4\u65b0
\ndb(update(stu).set(stu.name = “linyilong3”).where(stu.age>3));<\/p>\n

for (const auto& row : db(select(stu.name, stu.age)
\n.from(stu)
\n.where(stu.age > 1)))
\n{
\nstd::cout << row.name << “:” << row.age << std::endl;
\n}
\n}
\ncatch (std::exception& except)
\n{
\nstd::cout << except.what() << std::endl;
\n}
\nsystem(“pause”);
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"

\u539f\u6587\u5730\u5740   linyilon<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-5281","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=5281"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5281\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=5281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=5281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=5281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}