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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
...
Request Monitoring in Chrome
...not you can change that link to open in the same window by setting target='_self' ). Then, for example, you can see the response from the form that got submitted after it redirects you. Make sure to also notice the filter as the responses pile up on new page loads.
– JeremyS
...
How do I get the current username in Windows PowerShell?
...of the user running the PowerShell instance)
$(Get-WMIObject -class Win32_ComputerSystem | select username).username -- @TwonOfAn on this other forum
Comparison
@Kevin Panko's comment on @Mark Seemann's answer deals with choosing one of the categories over the other:
[The Windows access t...
How to change the color of an svg element?
...org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="500px" height="500px" viewBox="0 0 500 500" enable-background="new 0 0 500 500" xml:space="preserve">
&l...
Import CSV to SQLite
...swered Apr 3 '15 at 18:49
gyaani_guygyaani_guy
2,96577 gold badges3838 silver badges4747 bronze badges
...
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...
Find nearest value in numpy array
...
import numpy as np
def find_nearest(array, value):
array = np.asarray(array)
idx = (np.abs(array - value)).argmin()
return array[idx]
array = np.random.random(10)
print(array)
# [ 0.21069679 0.61290182 0.63425412 0.84635244 0.91599191 ...
MySQL: #126 - Incorrect key file for table
...
you can set tmpdir=/mysql_tmp or something in the my.cnf and it should be on the root filesystem (however big that is)
– Kevin Parker
Jan 2 '15 at 22:24
...
What's the point of JAXB 2's ObjectFactory classes?
...e(XhtmlStyleType value) {
return new JAXBElement<XhtmlStyleType>(_XhtmlHeadTypeStyle_QNAME, XhtmlStyleType.class, XhtmlHeadType.class, value);
}
This is how you get a <style> tag into a <head> tag:
ObjectFactory factory = new ObjectFactory();
XhtmlHtmlType html = factory.cre...
How to retrieve an element from a set without removing it?
...
next(iter(your_list or []), None) to handle None sets and empty sets
– MrE
Jul 31 '18 at 14:22
...