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how to generate migration to make references polymorphic
...ass AddImageableToProducts < ActiveRecord::Migration
def up
change_table :products do |t|
t.references :imageable, polymorphic: true
end
end
def down
change_table :products do |t|
t.remove_references :imageable, polymorphic: true
end
end
end
...
Apache: “AuthType not set!” 500 Error
...rsion 2.4.x of Apache.
Have you sure that you load this 2 modules ?
- mod_authn_core
- mod_authz_core
LoadModule authn_core_module modules/mod_authn_core.so
LoadModule authz_core_module modules/mod_authz_core.so
PS : My recommendation for authorization and rights is (by default) :
LoadModule ...
What is the best Java email address validation method? [closed]
...
Note: Use_the Emailvalidator in org.apache.commons.validator.routines since EmailValidator in org.apache.commons.validator is deprecated (I am using 1.6 commons Validator)
– HopeKing
Dec 22 '17 a...
Visual Studio loading symbols
...lready reported this obvious bug to Microsoft?
– real_yggdrasil
Sep 12 '12 at 9:54
Your a start, this has been driving...
How to find if an array contains a specific string in JavaScript/jQuery? [duplicate]
...
@Vyga It's _.indexOf.
– lonesomeday
Oct 21 '16 at 7:36
7
...
How do I get git to default to ssh and not https for new repositories
...il="$1"
hostname="$2"
hostalias="$hostname"
keypath="$HOME/.ssh/${hostname}_rsa"
ssh-keygen -t rsa -C $email -f $keypath
if [ $? -eq 0 ]; then
cat >> ~/.ssh/config <<EOF
Host $hostalias
Hostname $hostname *.$hostname
User git
IdentitiesOnly yes
IdentityFile $k...
Setting Icon for wpf application (VS 08)
...ly worked for me. This is how I did it:
Put the icon in a folder <icon_path> in the project directory
Mimic the folder path <icon_path> in the solution
Add a new item (your icon) in the solution folder you created
Add the following code in the WPF window's code behind:
Icon = new Bi...
What's the correct way to convert bytes to a hex string in Python 3?
...ii.hexlify('foo'.encode('utf8'))
b'666f6f'
>>> binascii.unhexlify(_).decode('utf8')
'foo'
See this answer:
Python 3.1.1 string to hex
share
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improve this answer
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...
Print text instead of value from C enum
...
I use something like this:
in a file "EnumToString.h":
#undef DECL_ENUM_ELEMENT
#undef DECL_ENUM_ELEMENT_VAL
#undef DECL_ENUM_ELEMENT_STR
#undef DECL_ENUM_ELEMENT_VAL_STR
#undef BEGIN_ENUM
#undef END_ENUM
#ifndef GENERATE_ENUM_STRINGS
#define DECL_ENUM_ELEMENT( element ) element,
#...
Regular vs Context Free Grammars
...ven includes epsilon as an third alternative: en.wikipedia.org/wiki/Regular_grammar)
– user764754
Feb 5 '12 at 18:26
...