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How do I make many-to-many field optional in Django?

When you have a many-to-many relationship ( related_name , not through ) and you are trying to use the admin interface you are required to enter one of the relationships even though it does not have to exist for you to create the first entry. ...
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Is it okay to use now?

I'm working on a mobile phone web app and I have several text fields that could benefit from <input type="tel"/> . iPhones will adjust the keyboard for the user, but I'm worried about breaking backwards compatibility. What I'm hoping is that browsers/phone that support this can assist the use...
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Getting only response header from HTTP POST using curl

One can request only the headers using HTTP HEAD, as option -I in curl(1) . 8 Answers ...
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MySQL: Invalid use of group function

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What is the difference between Eclipse for Java (EE) Developers and Eclipse Classic?

What is the difference between Eclipse for Java (EE) Developers and Eclipse Classic? 1 Answer ...
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git produces Gtk-WARNING: cannot open display

I've been working on my project remotely through the command line on a machine to which I don't have admin rights and after running git push origin master I get the following error message: ...
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Syntax Error: Not a Chance

I tried executed the following code in the python IDLE 2 Answers 2 ...
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File content into unix variable with newlines

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Using smart pointers for class members

I'm having trouble understanding the usage of smart pointers as class members in C++11. I have read a lot about smart pointers and I think I do understand how unique_ptr and shared_ptr / weak_ptr work in general. What I don't understand is the real usage. It seems like everybody recommends using...
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How to see the CREATE VIEW code for a view in PostgreSQL?

Is there an easy way to see the code used to create a view using the PostgreSQL command-line client? 6 Answers ...