LP1*_*P13 11 c# entity-framework-core asp.net-core
我们有现有的具有多个表名的数据库.例如Documents.我想使用新的EF Core和Asp.Net Core基于这篇文章与数据库的第一种方法在这里
我运行以下命令从现有数据库创建模型
Scaffold-DbContext"Server =(local); Database = MyDatabase; Trusted_Connection = True;"Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models
但是,当我运行scaffolding命令时,它会创建具有多个名称的模型.例如,Documents表转换为模型名称Documents.
如何更改它以便它可以使用模型的单一命名约定？(我不能改变数据库中的表名)
请注意,我已经阅读了与相同问题相关的SO上的一些帖子,但他们主要关注代码第一种方法.我正在使用数据库第一种方法.
Nic*_* N. 10
在Entity Framework Core v2中,他们引入了一个多元化钩子.你可以自己复制或单一化你的对象的地方.
您可以通过将其添加到项目中来实现:
public class MyDesignTimeServices : IDesignTimeServices
{
public void ConfigureDesignTimeServices(IServiceCollection services)
{
services.AddSingleton<IPluralizer, MyPluralizer>();
}
}
public class MyPluralizer : IPluralizer
{
public string Pluralize(string name)
{
return Inflector.Inflector.Pluralize(name) ?? name;
}
public string Singularize(string name)
{
return Inflector.Inflector.Singularize(name) ?? name;
}
}
更多信息:EF core 2中的新功能
您可以将此类用作Inflector:
using System.Collections.Generic;
using System.Text.RegularExpressions;
namespace DMP.Generator
{
public static class Inflector
{
#region Default Rules
static Inflector()
{
AddPlural("$", "s");
AddPlural("s$", "s");
AddPlural("(ax|test)is$", "$1es");
AddPlural("(octop|vir|alumn|fung)us$", "$1i");
AddPlural("(alias|status)$", "$1es");
AddPlural("(bu)s$", "$1ses");
AddPlural("(buffal|tomat|volcan)o$", "$1oes");
AddPlural("([ti])um$", "$1a");
AddPlural("sis$", "ses");
AddPlural("(?:([^f])fe|([lr])f)$", "$1$2ves");
AddPlural("(hive)$", "$1s");
AddPlural("([^aeiouy]|qu)y$", "$1ies");
AddPlural("(x|ch|ss|sh)$", "$1es");
AddPlural("(matr|vert|ind)ix|ex$", "$1ices");
AddPlural("([m|l])ouse$", "$1ice");
AddPlural("^(ox)$", "$1en");
AddPlural("(quiz)$", "$1zes");
AddSingular("s$", "");
AddSingular("(n)ews$", "$1ews");
AddSingular("([ti])a$", "$1um");
AddSingular("((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$", "$1$2sis");
AddSingular("(^analy)ses$", "$1sis");
AddSingular("([^f])ves$", "$1fe");
AddSingular("(hive)s$", "$1");
AddSingular("(tive)s$", "$1");
AddSingular("([lr])ves$", "$1f");
AddSingular("([^aeiouy]|qu)ies$", "$1y");
AddSingular("(s)eries$", "$1eries");
AddSingular("(m)ovies$", "$1ovie");
AddSingular("(x|ch|ss|sh)es$", "$1");
AddSingular("([m|l])ice$", "$1ouse");
AddSingular("(bus)es$", "$1");
AddSingular("(o)es$", "$1");
AddSingular("(shoe)s$", "$1");
AddSingular("(cris|ax|test)es$", "$1is");
AddSingular("(octop|vir|alumn|fung)i$", "$1us");
AddSingular("(alias|status)$", "$1");
AddSingular("(alias|status)es$", "$1");
AddSingular("^(ox)en", "$1");
AddSingular("(vert|ind)ices$", "$1ex");
AddSingular("(matr)ices$", "$1ix");
AddSingular("(quiz)zes$", "$1");
AddIrregular("person", "people");
AddIrregular("man", "men");
AddIrregular("child", "children");
AddIrregular("sex", "sexes");
AddIrregular("move", "moves");
AddIrregular("goose", "geese");
AddIrregular("alumna", "alumnae");
AddUncountable("equipment");
AddUncountable("information");
AddUncountable("rice");
AddUncountable("money");
AddUncountable("species");
AddUncountable("series");
AddUncountable("fish");
AddUncountable("sheep");
AddUncountable("deer");
AddUncountable("aircraft");
}
#endregion
private class Rule
{
private readonly Regex _regex;
private readonly string _replacement;
public Rule(string pattern, string replacement)
{
_regex = new Regex(pattern, RegexOptions.IgnoreCase);
_replacement = replacement;
}
public string Apply(string word)
{
if (!_regex.IsMatch(word))
{
return null;
}
return _regex.Replace(word, _replacement);
}
}
private static void AddIrregular(string singular, string plural)
{
AddPlural("(" + singular[0] + ")" + singular.Substring(1) + "$", "$1" + plural.Substring(1));
AddSingular("(" + plural[0] + ")" + plural.Substring(1) + "$", "$1" + singular.Substring(1));
}
private static void AddUncountable(string word)
{
_uncountables.Add(word.ToLower());
}
private static void AddPlural(string rule, string replacement)
{
_plurals.Add(new Rule(rule, replacement));
}
private static void AddSingular(string rule, string replacement)
{
_singulars.Add(new Rule(rule, replacement));
}
private static readonly List<Rule> _plurals = new List<Rule>();
private static readonly List<Rule> _singulars = new List<Rule>();
private static readonly List<string> _uncountables = new List<string>();
public static string Pluralize(this string word)
{
return ApplyRules(_plurals, word);
}
public static string Singularize(this string word)
{
return ApplyRules(_singulars, word);
}
#if NET45 || NETFX_CORE
[MethodImpl(MethodImplOptions.AggressiveInlining)]
#endif
private static string ApplyRules(List<Rule> rules, string word)
{
string result = word;
if (!_uncountables.Contains(word.ToLower()))
{
for (int i = rules.Count - 1; i >= 0; i--)
{
if ((result = rules[i].Apply(word)) != null)
{
break;
}
}
}
return result;
}
public static string Titleize(this string word)
{
return Regex.Replace(Humanize(Underscore(word)), @"\b([a-z])",
delegate (Match match)
{
return match.Captures[0].Value.ToUpper();
});
}
public static string Humanize(this string lowercaseAndUnderscoredWord)
{
return Capitalize(Regex.Replace(lowercaseAndUnderscoredWord, @"_", " "));
}
public static string Pascalize(this string lowercaseAndUnderscoredWord)
{
return Regex.Replace(lowercaseAndUnderscoredWord, "(?:^|_)(.)",
delegate (Match match)
{
return match.Groups[1].Value.ToUpper();
});
}
public static string Camelize(this string lowercaseAndUnderscoredWord)
{
return Uncapitalize(Pascalize(lowercaseAndUnderscoredWord));
}
public static string Underscore(this string pascalCasedWord)
{
return Regex.Replace(
Regex.Replace(
Regex.Replace(pascalCasedWord, @"([A-Z]+)([A-Z][a-z])", "$1_$2"), @"([a-z\d])([A-Z])",
"$1_$2"), @"[-\s]", "_").ToLower();
}
public static string Capitalize(this string word)
{
return word.Substring(0, 1).ToUpper() + word.Substring(1).ToLower();
}
public static string Uncapitalize(this string word)
{
return word.Substring(0, 1).ToLower() + word.Substring(1);
}
public static string Ordinalize(this string numberString)
{
return Ordanize(int.Parse(numberString), numberString);
}
public static string Ordinalize(this int number)
{
return Ordanize(number, number.ToString());
}
#if NET45 || NETFX_CORE
[MethodImpl(MethodImplOptions.AggressiveInlining)]
#endif
private static string Ordanize(int number, string numberString)
{
int nMod100 = number % 100;
if (nMod100 >= 11 && nMod100 <= 13)
{
return numberString + "th";
}
switch (number % 10)
{
case 1:
return numberString + "st";
case 2:
return numberString + "nd";
case 3:
return numberString + "rd";
default:
return numberString + "th";
}
}
public static string Dasherize(this string underscoredWord)
{
return underscoredWord.Replace('_', '-');
}
}
}
可以在这里找到变形器类
对于脚手架我使用dotnet ef命令.
我的项目中包含以下NuGet包:
<ItemGroup>
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.0.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.0.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.0.1" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.1" />
<PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.1" />
</ItemGroup>
<ItemGroup>
<DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.0.1" />
<DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.1" />
</ItemGroup>
您可以使用Bricelam.EntityFrameworkCore.Pluralizer。要使用该软件包，只需安装它。对现有数据库中的模型进行逆向工程时，将使用复数形式。
// Tools > NuGet Package manager > Package Manager Console:
PM> Install-Package Bricelam.EntityFrameworkCore.Pluralizer
然后运行您的Scaffold-DbContext ...命令。而已！
Scaffold-DbContext "ConnectionStr..." Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models
EF Core 工具当前不包含用于按照您描述的方式自定义对现有数据库进行逆向工程的输出的选项。目前，您唯一现实的选择是修改生成的代码。
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