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How do you write a migration to rename an ActiveRecord model and its table in Rails?
...thee: yes, you have to change that manually, or using an IDE that can do Ruby refactoring and commit it to your version control system.
– pupeno
Apr 30 '10 at 9:00
13
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jQuery Set Cursor Position in Text Area
...hen you can use setCaretToPos like this:
setCaretToPos(document.getElementById("YOURINPUT"), 4);
Live example with both a textarea and an input, showing use from jQuery:
function setSelectionRange(input, selectionStart, selectionEnd) {
if (input.setSelectionRange) {
input.focus();
...
What is the purpose of Flask's context stacks?
... resolution is to push the application context yourself, which can be done by doing...
from myapp import app, db
# Set up models
with app.app_context():
db.create_all()
This will push a new application context (using the application of app, remember there could be more than one application)....
This Row already belongs to another table error when trying to add rows?
... not allow you to have the same DataRow for different DataTables? Is this by design?
– Xaisoft
Apr 6 '09 at 15:52
3
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Get to UIViewController from UIView?
...s achieved
There is no built-in way to do it. While you can get around it by adding a IBOutlet on the UIView and connecting these in Interface Builder, this is not recommended. The view should not know about the view controller. Instead, you should do as @Phil M suggests and create a protocol to be...
Where can I set environment variables that crontab will use?
...ns the job from the terminal, however, obviously these don't get picked up by crontab when it runs.
14 Answers
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ALTER TABLE to add a composite primary key
... existing primary key. If that primary key is being used as a foreign key by another table you will get an error when trying to drop it. In some versions of mysql the error message there was malformed (as of 5.5.17, this error message is still
alter table parent drop column id;
ERROR 1025 (HY000...
What is the best way to implement “remember me” for a website? [closed]
...hentication, and a false alarm (because the token has been already changed by the first request). (This situation can happen when the browser starts up, and the site is restored in two browser tabs.)
– slobo
May 14 '15 at 10:54
...
List files in local git repo?
... --name-only HEAD
lists all of the already committed files being tracked by your git repo.
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Chrome Extension how to send data from content script to popup.html
...ds with the new data.
const setDOMInfo = info => {
document.getElementById('total').textContent = info.total;
document.getElementById('inputs').textContent = info.inputs;
document.getElementById('buttons').textContent = info.buttons;
};
// Once the DOM is ready...
window.addEventListener('...