/// <summary>
/// Get the path from the expression, including considering dictionary calls
/// </summary>
public Result GetPath(Expression expression)
{
expression = SimplifyExpression(expression);
var callExpression = expression as MethodCallExpression;
if (callExpression != null)
{
var customMethodResult = conventions.TranslateCustomQueryExpression(this, callExpression);
if (customMethodResult != null)
{
return(customMethodResult);
}
if (callExpression.Method.Name == "Count" && callExpression.Method.DeclaringType == typeof(Enumerable))
{
if (callExpression.Arguments.Count != 1)
{
throw new ArgumentException("Not supported computation: " + callExpression +
". You cannot use computation in RavenDB queries (only simple member expressions are allowed).");
}
var target = GetPath(callExpression.Arguments[0]);
return(new Result
{
MemberType = callExpression.Method.ReturnType,
IsNestedPath = false,
Path = target.Path + @".Count\(\)"
});
}
if (callExpression.Method.Name == "get_Item")
{
var parent = GetPath(callExpression.Object);
return(new Result
{
MemberType = callExpression.Method.ReturnType,
IsNestedPath = false,
Path = parent.Path + "." +
GetValueFromExpression(callExpression.Arguments[0], callExpression.Method.GetParameters()[0].ParameterType)
});
}
throw new InvalidOperationException("Cannot understand how to translate " + callExpression);
}
var memberExpression = GetMemberExpression(expression);
var customMemberResult = conventions.TranslateCustomQueryExpression(this, memberExpression);
if (customMemberResult != null)
{
return(customMemberResult);
}
// we truncate the nullable .Value because in json all values are nullable
if (memberExpression.Member.Name == "Value" &&
Nullable.GetUnderlyingType(memberExpression.Expression.Type) != null)
{
return(GetPath(memberExpression.Expression));
}
AssertNoComputation(memberExpression);
var result = new Result
{
Path = memberExpression.ToString(),
IsNestedPath = memberExpression.Expression is MemberExpression,
MemberType = memberExpression.Member.GetMemberType(),
MaybeProperty = memberExpression.Member as PropertyInfo
};
result.Path = HandlePropertyRenames(memberExpression.Member, result.Path);
return(result);
}
