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find vs find_by vs where
...its your needs best.
The find method is usually used to retrieve a row by ID:
Model.find(1)
It's worth noting that find will throw an exception if the item is not found by the attribute that you supply. Use where (as described below, which will return an empty array if the attribute is not foun...
Passing variables through handlebars partial
...of html potentially on the same page, but you're doomed if the partial has IDs... the same ID will show up more than once and becomes invalid. It'd be extremely useful if you can pass in arguments to partials when invoking it, to further customize its content.
– Xavier_Ex
...
How to handle anchor hash linking in AngularJS
...call it in your controller, and it will scroll you to any element with the id found in $location.hash()
app.controller('TestCtrl', function($scope, $location, $anchorScroll) {
$scope.scrollTo = function(id) {
$location.hash(id);
$anchorScroll();
}
});
<a ng-click="scrollTo('fo...
Define variable to use with IN operator (T-SQL)
...
DECLARE @mylist TABLE (Id int)
INSERT INTO @mylist
SELECT id FROM (VALUES (1),(2),(3),(4),(5)) AS tbl(id)
SELECT * FROM Mytable WHERE theColumn IN (select id from @mylist)
...
Aligning textviews on the left and right edges in Android layout
I am getting started with Android. I am having trouble getting a simple layout going.
9 Answers
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Why am I getting a “401 Unauthorized” error in Maven?
...line it works, but then when you do it from a script it fails (because it didn't exist in the repository the first time around). Either publish using a different version number, or delete the old artefact on the server and republish.
The SNAPSHOTS repository (as opposed to the releases repository)...
SQL WHERE condition is not equal to?
...
You can do like this
DELETE FROM table WHERE id NOT IN ( 2 )
OR
DELETE FROM table WHERE id <> 2
As @Frank Schmitt noted, you might want to be careful about the NULL values too. If you want to delete everything which is not 2(including the NULLs) then add O...
How to add a primary key to a MySQL table?
...mn, you can always add the primary key:
ALTER TABLE goods ADD PRIMARY KEY(id)
As to why your script wasn't working, you need to specify PRIMARY KEY, not just the word PRIMARY:
alter table goods add column `id` int(10) unsigned primary KEY AUTO_INCREMENT;
...
CSS styling in Django forms
...e'> in Django
class MyForm(forms.Form):
myfield = forms.CharField(widget=forms.TextInput(attrs={'class' : 'myfieldclass'}))
or
class MyForm(forms.ModelForm):
class Meta:
model = MyModel
def __init__(self, *args, **kwargs):
super(MyForm, self).__init__(*args, **kwa...