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143 lines
3.5 KiB
C#
143 lines
3.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using FreeSql;
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using Microsoft.AspNetCore.Mvc;
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namespace dbcontext_01.Controllers
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{
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[Route("api/[controller]")]
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[ApiController]
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public class ValuesController : ControllerBase
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{
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IFreeSql _orm;
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public ValuesController(SongContext songContext,
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IFreeSql orm1, IFreeSql orm2,
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IFreeSql<long> orm3
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) {
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_orm = orm1;
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}
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// GET api/values
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[HttpGet]
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async public Task<string> Get()
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{
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long id = 0;
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try {
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using (var ctx = new SongContext()) {
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ctx.Songs.Select.Where(a => a.Id > 10).ToList();
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//查询结果，进入 states
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var song = new Song { };
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//可插入的 song
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ctx.Songs.Add(song);
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id = song.Id;
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//因有自增类型，立即开启事务执行SQL，返回自增值
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var adds = Enumerable.Range(0, 100)
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.Select(a => new Song { Create_time = DateTime.Now, Is_deleted = false, Title = "xxxx" + a, Url = "url222" })
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.ToList();
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//创建一堆无主键值
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ctx.Songs.AddRange(adds);
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//立即执行，将自增值赋给 adds 所有元素，因为有自增类型，如果其他类型，指定传入主键值，不会立即执行
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for (var a = 0; a < 10; a++)
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adds[a].Title = "dkdkdkdk" + a;
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ctx.Songs.UpdateRange(adds);
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//批量修改，进入队列
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ctx.Songs.RemoveRange(adds.Skip(10).Take(20).ToList());
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//批量删除，进入队列，完成时 10-20 元素的主键值会被清除
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//ctx.Songs.Update(adds.First());
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adds.Last().Url = "skldfjlksdjglkjjcccc";
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ctx.Songs.Update(adds.Last());
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//单条修改 urls 的值，进入队列
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//throw new Exception("回滚");
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//ctx.Songs.Select.First();
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//这里做一个查询，会立即打包【执行队列】，避免没有提交的数据，影响查询结果
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ctx.SaveChanges();
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//打包【执行队列】，提交事务
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}
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//using (var ctx = new SongContext()) {
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// var song = new Song { };
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// await ctx.Songs.AddAsync(song);
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// id = song.Id;
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// var adds = Enumerable.Range(0, 100)
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// .Select(a => new Song { Create_time = DateTime.Now, Is_deleted = false, Title = "xxxx" + a, Url = "url222" })
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// .ToList();
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// await ctx.Songs.AddRangeAsync(adds);
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// for (var a = 0; a < adds.Count; a++)
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// adds[a].Title = "dkdkdkdk" + a;
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// ctx.Songs.UpdateRange(adds);
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// ctx.Songs.RemoveRange(adds.Skip(10).Take(20).ToList());
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// //ctx.Songs.Update(adds.First());
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// adds.Last().Url = "skldfjlksdjglkjjcccc";
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// ctx.Songs.Update(adds.Last());
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// //throw new Exception("回滚");
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// await ctx.SaveChangesAsync();
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//}
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} catch {
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var item = await _orm.Select<Song>().Where(a => a.Id == id).FirstAsync();
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throw;
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}
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var item22 = await _orm.Select<Song>().Where(a => a.Id == id).FirstAsync();
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var item33 = await _orm.Select<Song>().Where(a => a.Id > id).ToListAsync();
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return item22.Id.ToString();
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}
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// GET api/values/5
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[HttpGet("{id}")]
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public ActionResult<string> Get(int id)
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{
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return "value";
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}
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// POST api/values
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[HttpPost]
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public void Post([FromBody] string value)
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{
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}
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// PUT api/values/5
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[HttpPut("{id}")]
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public void Put(int id, [FromBody] string value)
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{
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}
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// DELETE api/values/5
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[HttpDelete("{id}")]
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public void Delete(int id)
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{
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}
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}
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}
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