ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the

ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the

In a nutshell the exception is thrown during POSTing wrapper model and changing the state of one entry to 'Modified'. Before changing the state, the state is set to 'Detached' but calling Attach() does throw the same error. I'm using EF6.Pl

How do I parse command line arguments in Bash?

How do I parse command line arguments in Bash?

Say, I have a script that gets called with this line:./myscript -vfd ./foo/bar/someFile -o /fizz/someOtherFileor this one:./myscript -v -f -d -o /fizz/someOtherFile ./foo/bar/someFile What's the accepted way of parsing this such that in eac

How to pass objects to functions in C++?

How to pass objects to functions in C++?

I am new to C++ programming, but I have experience in Java. I need guidance on how to pass objects to functions in C++.Do I need to pass pointers, references, or non-pointer and non-reference values? I remember in Java there are no such iss

Why do I get a segmentation fault when writing to a string initialized with “char *s” but not “char

Why do I get a segmentation fault when writing to a string initialized with “char *s” but not “char

The following code receives seg fault on line 2: char *str = "string"; str[0] = 'z'; printf("%s", str);While this works perfectly well: char str[] = "string"; str[0] = 'z'; printf("%s", str);Tested with MSVC and GCC. 1:See the C FA

How to combine filter and map in scala?

How to combine filter and map in scala?

I have List[Int] in Scala. The List is List(1,2,3,4,5,6,7,8,9,10). I want to filter the list so that it only has even numbers. And I want to muliply the numbers with 2. Is it possible?I hope I have explained the question clearly. If u have

How to import huge CSV file with 200,00 rows to MySQL (asynchronous and fast)?

How to import huge CSV file with 200,00 rows to MySQL (asynchronous and fast)?

I have to write a PHP script that will import data from a given CSV file into MySQL database. The given CSV file can contain up to 200,000 rows.I tried the following but problems arise : LOAD DATA LOCAL INFILE : I cannot use LOAD DATA LOCAL

Backwards compatible PageTransformer

Backwards compatible PageTransformer

I'm trying to animate items in a ViewPager and the PageTransformer fits the bill. I want it to be backwards compatible to Android 2.2 so am using the support v4 library. However... As property animation is only supported as of Android 3.0

GRAILS: Find all children in a self-referenced one-to-many relationship

GRAILS: Find all children in a self-referenced one-to-many relationship

In grails,How would one find all the children in a one-to-many relationship e.g.,class Employee { static hasMany = [ subordinates: Employee ] static belongsTo = [ manager: Employee ]}Using a single manager, how would one get the subor

R quantmod chartSeries newTA chob - modify legend and axis (primary and secundary)

R quantmod chartSeries newTA chob - modify legend and axis (primary and secundary)

This is an advanced question.I use my own layout for the chartSeries quantmod function, and I can even create my own newTA. Everything works fine. But ...What I want to do but I can't:a) Manipulate the legend of each of the 3 charts: -

React: leave the contents of a component alone

React: leave the contents of a component alone

Is it possible to have React ignore a subtree? i.e., don't compare or update it?My use case is migrating to React. Re-writing all our Handlebars templates at once isn't feasible, but if we could use our existing templates for some subcompon

How can I create a windows installer MSI that does not require admin access

How can I create a windows installer MSI that does not require admin access

I've created an MSI windows installer that installs a plug-in which I wrote for a piece of software used at my office. However, a number of users here don't have admin rights to their computers, and IT is getting frustrated having to instal

What are the characteristics of spaghetti code?

What are the characteristics of spaghetti code?

Somebody said that when your PHP code and application use global variables then it must be spaghetti code (I assume this). I use WordPress a lot. As far as I know, it's the best thing near great PHP software. And it uses many global variab

Show selected option in bootstrap dropdown list menu

Show selected option in bootstrap dropdown list menu

I have dropdown list in my bootstrap menu. Chose option Option 1 Option 2 Option 3 Option 4 I'm trying to get selected option in dropdown as title of dropdown instead of "chose option", as it is now. I have tried several solu

CSS-Less class extend class with pseudo class

CSS-Less class extend class with pseudo class

I was wondering how I could do something like the following with less css:.btn { color : black;}.btn:hover { color : white;}.btn-foo { .btn; &:hover { .btn:hover; }}Of-course this is just an example, what need to point is if there i

How to replace nth character of a string with another

How to replace nth character of a string with another

How could I replace nth character of a String with another one?func replace(myString:String, index:Int, newCharac:Character) -> String { // Write correct code here return modifiedString}For example, replace("House", 2, "r") should be

Why FontStretch does not work in WPF?

Why FontStretch does not work in WPF?

I am trying setting FontStretch property on a TextBlock in WPF but it seems that it does not work. I tried Expanded, Condensed, etc. but the text appearance does not change.I am working on Windows XP with Framework 4.0 and tested both with

Confused about java properties file location

Confused about java properties file location

I have simple java project with structure:package com.abc: a.java b.java c.propertiesI have database configuration parameters configured in c.properties file.Inside a.java and b.java, I am loading properties file using:Properties p

Django readonly field only on change, but not when creating

Django readonly field only on change, but not when creating

I have a Team model whit players ManyToManyField, and I want to be able to add Players to a new team when created, but not able to modify it after created.If I make the players field readonly like this:# admin.pyclass TeamAdmin(admin.ModelA

c++ std::ostringstream vs std::string::append

c++ std::ostringstream vs std::string::append

In all examples that use some kind of buffering I see they use stream instead of string. How is std::ostringstream and std::ostringstream os;os vsstd::string header("Content-Type: ");header.append(contentType);header.append(";charset=");hea

Allow null in foreign key to user. Django

Allow null in foreign key to user. Django

I have this modelclass Vacancy(models.Model): user = models.ForeignKey(User, null=True, blank=True, default = None) name = models.CharField(max_length=64)When in admin i try to creat a vacancy without a user. And it throws an error "

Function returning struct as LValue

Function returning struct as LValue

In the following snippet, why does the line o.margin() = m; compile without fault? It easily deserves a warning, since it will almost invariably be a mistake. I would actually have thought it to be an error since it puts an R-Value on the l

Function for converting dataframe column type

Function for converting dataframe column type

R often understands data frame columns in a "wrong" format or you just have to change the column class from factor to character in order to modify it. I have been changing the column class in following way previously:set.seed(1)df And back

How to change View & partial view default location

How to change View & partial view default location

i am new in MVC and very curious about to know that how could i change view & partial view location.we know that view & partial view store in view folder. if my controller name is home then view must be store in home folder inside view fold

JS onclick=\"history.go(-1) only if under my domain

JS onclick=\"history.go(-1) only if under my domain

I have a Joomla site, and I have the following problem, I need a "Back to search page" function on my product details page, and I am using this code after some changes according to replies to my initian question:Now, if a Visitor comes fro

C++ difference between ** and *& in parameter passing

C++ difference between ** and *& in parameter passing

I have implemented operations on a list, one of them is add, and since i don't want to return anything, i read that i had to use **, and it works, but i saw on another place that it is passed as *&, but i don't know the differenceaddNode( n