0x00 Chapter 7: CRUD Database Operations
在 routes.swift 文件内写各种路由 操作数据库的记录
1.create 创建记录,之前的文章已经写过了 需要提交数据
url: http://127.0.0.1:8080/api/acronyms method: POST parameters: {"short": "TGD", "long":"Tomorrow is a good day"}
app.post("api", "acronyms") { req -> EventLoopFuture<Acronym> in
let acronym = try req.content.decode(Acronym.self)
return acronym.save(on: req.db).map {
acronym
}
}
2.retrieve 获取所有记录
url: http://127.0.0.1:8080/api/acronyms method: GET parameters: 无
app.get("api", "acronyms") { req -> EventLoopFuture<[Acronym]> in
Acronym.query(on: req.db).all()
}
3.retrieve a single acronym 根据 ID 查询记录
url: http://127.0.0.1:8080/api/acronyms/<ID> method: GET parameters: ID
app.get("api", "acronyms", ":acronymID") { req -> EventLoopFuture<Acronym> in
Acronym.find(req.parameters.get("acronymID"), on: req.db)
.unwrap(or: Abort(.notFound))
}
4.update 根据 ID 更新记录
url: http://127.0.0.1:8080/api/acronyms/<ID> method: UPDATE parameters: {"short": "TGD1", "long":"Tomorrow is a good day1"}
app.put("api", "acronyms", ":acronymID") { req -> EventLoopFuture<Acronym> in
let updatedAcronym = try req.content.decode(Acronym.self)
return Acronym.find(req.parameters.get("acronymID"), on: req.db)
.unwrap(or: Abort(.notFound)).flatMap { acronym in
acronym.short = updatedAcronym.short
acronym.long = updatedAcronym.long
return acronym.save(on: req.db).map {
acronym
}
}
}
5.delete 根据 ID 删除记录
url: http://127.0.0.1:8080/api/acronyms/<ID> method: DELETE parameters: ID
app.delete("api", "acronyms", ":acronymID") { req -> EventLoopFuture<HTTPStatus> in
Acronym.find(req.parameters.get("acronymID"), on: req.db)
.unwrap(or: Abort(.notFound))
.flatMap { acronym in
acronym.delete(on: req.db)
.transform(to: .noContent)
}
}
6.filter 根据参数查询记录
url: http://127.0.0.1:8080/api/acronyms/search?term=OMG method: GET parameters: 无
app.get("api", "acronyms", "search") { req -> EventLoopFuture<[Acronym]> in
guard let searchTerm = req.query[String.self, at: "term"] else {
throw Abort(.badRequest)
}
return Acronym.query(on: req.db)
.filter(\.$short == searchTerm)
.all()
}
filter group url: http://127.0.0.1:8080/api/acronyms/search?term=Oh+My+God method: GET parameters: 无
app.get("api", "acronyms", "search") { req -> EventLoopFuture<[Acronym]> in
guard let searchTerm = req.query[String.self, at: "term"] else {
throw Abort(.badRequest)
}
return Acronym.query(on: req.db).group(.or) { or in
or.filter(\.$short == searchTerm)
or.filter(\.$long == searchTerm)
}.all()
}
7.first result 查询第一条记录
url: http://127.0.0.1:8080/api/acronyms/first method: GET parameters: 无
app.get("api", "acronyms", "first") { req -> EventLoopFuture<Acronym> in
Acronym.query(on: req.db).first().unwrap(or: Abort(.notFound))
}
8.sorting results 对所有查询记录进行排序
url: http://127.0.0.1:8080/api/acronyms/sorted method: GET parameters: 无
app.get("api", "acronyms", "sorted") { req -> EventLoopFuture<[Acronym]> in
Acronym.query(on: req.db).sort(\.$short, .ascending).all()
}
0x01 我的作品
欢迎体验我的作品之一:小笔记 一步到位,好帮手! App Store 搜索即可~
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