public void RandomTest()
{
using (var mysql = ApplicationDbContext.UseMySql())
{
var query = mysql.SimpleModels.Random(2);
var sql = query.ToSql();
string expectedSql;
if (EFVersion.AtLeast(3, 0))
{
expectedSql = @"SELECT `s`.`Id`, `s`.`Age`, `s`.`Birthday`, `s`.`Name`, `s`.`State`
FROM `SimpleModels` AS `s`
ORDER BY RAND()
LIMIT @__p_0;
";
}
else if (EFVersion.AtLeast(2, 0))
{
expectedSql = @"SELECT `x`.`Id`, `x`.`Age`, `x`.`Birthday`, `x`.`Name`, `x`.`State`
FROM `SimpleModels` AS `x`
ORDER BY RAND()
LIMIT 2;
";
}
else
{
throw EFVersion.NotSupportedException;
}
Assert.Equal(expectedSql, sql);
}
}
/// <summary>
/// Gets the generated Sql string.
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="this"></param>
/// <returns></returns>
public static string ToSql <TEntity>(this IQueryable <TEntity> @this)
{
if (EFVersion.AtLeast(3, 1))
{
throw EFVersion.NeedNewerVersionException;
}
else if (EFVersion.AtLeast(3, 0))
{
var enumerable = @this.Provider.Execute <IEnumerable <TEntity> >(@this.Expression);
var reflector_enumerator = enumerable.GetEnumerator().GetReflector();
var factory = reflector_enumerator.DeclaredField <IQuerySqlGeneratorFactory>("_querySqlGeneratorFactory").Value;
var sqlGenerator = factory.Create();
var selectExpression = reflector_enumerator.DeclaredField <SelectExpression>("_selectExpression").Value;
var command = sqlGenerator.GetCommand(selectExpression);
var sql = $"{command.CommandText};{Environment.NewLine}";
return(sql);
}
else
{
throw EFVersion.NotSupportedException;
}
}
private void SetInitialMultiplicity(BidirectionalAssociation element)
{
// valid bidirectional associations:
// EF6 - entity to entity
// EFCore - entity to entity, entity to dependent, dependent to entity
// EFCore5Plus - entity to entity, entity to dependent, dependent to entity
ModelRoot modelRoot = element.Source.ModelRoot;
EFVersion entityFrameworkVersion = modelRoot.EntityFrameworkVersion;
if (entityFrameworkVersion == EFVersion.EF6)
{
if (element.Source.IsEntity() && element.Target.IsEntity())
{
element.SourceMultiplicity = Multiplicity.One;
element.TargetMultiplicity = Multiplicity.ZeroMany;
}
}
else if (entityFrameworkVersion == EFVersion.EFCore && !modelRoot.IsEFCore5Plus)
{
if (element.Source.IsEntity() && element.Target.IsEntity())
{
element.SourceMultiplicity = Multiplicity.One;
element.TargetMultiplicity = Multiplicity.ZeroMany;
}
if (element.Source.IsEntity() && element.Target.IsDependent())
{
element.SourceMultiplicity = Multiplicity.One;
element.TargetMultiplicity = Multiplicity.One;
}
if (element.Source.IsDependent() && element.Target.IsEntity())
{
element.SourceMultiplicity = Multiplicity.One;
element.TargetMultiplicity = Multiplicity.One;
}
}
else if (entityFrameworkVersion == EFVersion.EFCore && modelRoot.IsEFCore5Plus)
{
if (element.Source.IsEntity() && element.Target.IsEntity())
{
element.SourceMultiplicity = Multiplicity.One;
element.TargetMultiplicity = Multiplicity.ZeroMany;
}
if (element.Source.IsEntity() && element.Target.IsDependent())
{
element.SourceMultiplicity = Multiplicity.One;
element.TargetMultiplicity = Multiplicity.One;
}
if (element.Source.IsDependent() && element.Target.IsEntity())
{
element.SourceMultiplicity = Multiplicity.One;
element.TargetMultiplicity = Multiplicity.One;
}
}
}
public NuGetDisplay(EFVersion efVersion, string packageId, string packageVersion, string display, string majorMinorVersion)
{
EFVersion = efVersion;
PackageId = packageId;
ActualPackageVersion = packageVersion;
DisplayVersion = display;
MajorMinorVersion = majorMinorVersion;
}
private static bool CanAcceptModelClassAndModelClassAsSourceAndTarget(ModelClass sourceModelClass, ModelClass targetModelClass)
{
// valid bidirectional associations:
// EF6 - entity to entity
// EFCore - entity to entity, entity to dependent, dependent to entity
// EFCore5Plus - entity to entity, entity to dependent, dependent to entity
ModelRoot modelRoot = sourceModelClass.ModelRoot;
EFVersion entityFrameworkVersion = modelRoot.EntityFrameworkVersion;
if (entityFrameworkVersion == EFVersion.EF6)
{
if (sourceModelClass.IsEntity() && targetModelClass.IsEntity())
{
return(true);
}
}
else if (entityFrameworkVersion == EFVersion.EFCore && !modelRoot.IsEFCore5Plus)
{
if (sourceModelClass.IsEntity() && targetModelClass.IsEntity())
{
return(true);
}
if (sourceModelClass.IsEntity() && targetModelClass.IsDependent())
{
return(true);
}
if (sourceModelClass.IsDependent() && targetModelClass.IsEntity())
{
return(true);
}
}
else if (entityFrameworkVersion == EFVersion.EFCore && modelRoot.IsEFCore5Plus)
{
if (sourceModelClass.IsEntity() && targetModelClass.IsEntity())
{
return(true);
}
if (sourceModelClass.IsEntity() && targetModelClass.IsDependent())
{
return(true);
}
if (sourceModelClass.IsDependent() && targetModelClass.IsEntity())
{
return(true);
}
}
return(false);
}
private static bool CanAcceptModelClassAsTarget(ModelClass candidate)
{
// valid unidirectional associations:
// EF6 - entity to entity, entity to dependent
// EFCore - entity to entity, entity to dependent
// EFCore5Plus - entity to entity, entity to dependent, dependent to dependent, keyless to entity
ModelRoot modelRoot = candidate.ModelRoot;
EFVersion entityFrameworkVersion = modelRoot.EntityFrameworkVersion;
if (entityFrameworkVersion == EFVersion.EF6)
{
if (candidate.IsEntity())
{
return(true);
}
if (candidate.IsDependent())
{
return(true);
}
}
else if (entityFrameworkVersion == EFVersion.EFCore && !modelRoot.IsEFCore5Plus)
{
if (candidate.IsEntity())
{
return(true);
}
if (candidate.IsDependent())
{
return(true);
}
}
else if (entityFrameworkVersion == EFVersion.EFCore && modelRoot.IsEFCore5Plus)
{
if (candidate.IsEntity())
{
return(true);
}
if (candidate.IsDependent())
{
return(true);
}
}
return(false);
}
/// <summary>
/// Gets the generated Sql string.
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="this"></param>
/// <returns></returns>
public static string ToSql <TEntity>(this IQueryable <TEntity> @this)
{
if (EFVersion.AtLeast(3, 0))
{
throw EFVersion.NeedNewerVersionException;
}
if (EFVersion.AtLeast(2, 1))
{
var queryCompiler = @this.Provider.GetReflector <EntityQueryProvider>().DeclaredField <QueryCompiler>("_queryCompiler").Value;
var queryCompilerReflector = queryCompiler.GetReflector();
var queryModel = queryCompilerReflector.DeclaredField <QueryModelGenerator>("_queryModelGenerator").Value.ParseQuery(@this.Expression);
var dependencies = queryCompilerReflector.DeclaredProperty <Database>("Database").DeclaredProperty <DatabaseDependencies>("Dependencies").Value;
var modelVisitor = dependencies.QueryCompilationContextFactory.Create(false).CreateQueryModelVisitor() as RelationalQueryModelVisitor;
modelVisitor.CreateQueryExecutor <TEntity>(queryModel);
var sql = modelVisitor.Queries.Select(x => $"{x.ToString().TrimEnd(';')};{Environment.NewLine}").Join("");
return(sql);
}
else if (EFVersion.AtLeast(2, 0))
{
var queryCompiler = @this.Provider.GetReflector <EntityQueryProvider>().DeclaredField <QueryCompiler>("_queryCompiler").Value;
var queryCompilerReflector = queryCompiler.GetReflector();
var nodeTypeProvider = queryCompilerReflector.DeclaredProperty <INodeTypeProvider>("NodeTypeProvider").Value;
var parser = queryCompilerReflector.Method("CreateQueryParser").Call(nodeTypeProvider) as QueryParser;
var queryModel = parser.GetParsedQuery(@this.Expression);
var dependencies = queryCompilerReflector.DeclaredProperty <Database>("Database").DeclaredProperty <DatabaseDependencies>("Dependencies").Value;
var modelVisitor = dependencies.QueryCompilationContextFactory.Create(false).CreateQueryModelVisitor() as RelationalQueryModelVisitor;
modelVisitor.CreateQueryExecutor <TEntity>(queryModel);
var sql = modelVisitor.Queries.Select(x => $"{x.ToString().TrimEnd(';')};{Environment.NewLine}").Join("");
return(sql);
}
else
{
throw EFVersion.NotSupportedException;
}
}
private static void LoadNuGetVersions(EFVersion efVersion, string packageId)
{
// get NuGet packages with that package id
HttpResponseMessage responseMessage = httpClient.GetAsync(string.Format(NUGET_URL, packageId)).GetAwaiter().GetResult();
string jsonString = responseMessage.Content.ReadAsStringAsync().GetAwaiter().GetResult();
NuGetPackages nugetPackages = NuGetPackages.FromJson(jsonString);
string id = packageId.ToLower();
// get their versions
List <string> result = nugetPackages.Data
.Where(x => x.Title.ToLower() == id)
.SelectMany(x => x.Versions)
.OrderBy(v => v.VersionVersion)
.Select(v => v.VersionVersion)
.ToList();
// find the major.minor versions
List <string> majorVersions = result.Select(v => string.Join(".", v.Split('.').Take(2))).OrderBy(v => v).Distinct().ToList();
// do the trivial mapping of the full version to the full display name
foreach (string v in result)
{
NuGetPackageDisplay.Add(new NuGetDisplay(efVersion, packageId, v, v, string.Join(".", v.Split('.').Take(2))));
}
// figure out which one is the latest in the major.minor set and add its mapping
foreach (string v in majorVersions)
{
NuGetPackageDisplay.Add(new NuGetDisplay(efVersion, packageId, result.FindLast(x => x.StartsWith($"{v}.")), $"{v}.Latest", v));
}
// figure out which is the overall latest and map it
NuGetPackageDisplay.Add(new NuGetDisplay(efVersion, packageId, result.FindLast(x => !x.EndsWith(".Latest")), "Latest", majorVersions.Last()));
// tuck it away
EFPackageVersions.Add(efVersion, NuGetPackageDisplay.Where(p => p.EFVersion == efVersion).Select(p => p.DisplayVersion).ToList());
}