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Setting up foreign keys in phpMyAdmin?
... an index on the foreign key column in the referring table (so foo_bar.foo_id, in your case). Then, go to relation view (in the referring table) and select the referred column (so in your case foo.id) and the on update and on delete actions.
I think foreign keys are useful if you have multiple tabl...
Find html label associated with a given input
...l have a corresponding <label> with the for attribute set to the id of it's companion. In this case, I know that each input will only have a single label.
...
Why can't Python parse this JSON data?
...
Your data is not valid JSON format. You have [] when you should have {}:
[] are for JSON arrays, which are called list in Python
{} are for JSON objects, which are called dict in Python
Here's how your JSON file should look:
{
"maps": [...
REST Complex/Composite/Nested Resources [closed]
... (covers) may be cross-referenced. For example, you might also wish to provide references to authors, publishers , characters, or categories separately. You may wish to create these resources separately or before the comic book which references them as child resources. Alternatively, you may wish to...
Difference between and
...c A() {
System.out.println("creating bean A: " + this);
}
public void setBbb(B bbb) {
System.out.println("setting A.bbb with " + bbb);
this.bbb = bbb;
}
public void setCcc(C ccc) {
System.out.println("setting A.ccc with " + ccc);
this.ccc = ccc;
}
}
With the followin...
What is the difference between pluck and collect in Rails?
...particular field. See this.
When you do:
User.first.gifts.collect(&:id)
You have objects with all fields loaded and you simply get the id thanks to the method based on Enumerable.
So:
if you only need the id with Rails 4, use ids: User.first.gifts.ids
if you only need some fields with Ra...
Remove Primary Key in MySQL
...erty before dropping the key:
ALTER TABLE user_customer_permission MODIFY id INT NOT NULL;
ALTER TABLE user_customer_permission DROP PRIMARY KEY;
Note that you have a composite PRIMARY KEY which covers all three columns and id is not guaranteed to be unique.
If it happens to be unique, you can m...
How to get RelativeLayout working with merge and include?
...oogle.com/issues/36908001
To fix it, make sure you overwrite BOTH layout_width and layout_height when including, otherwise everything will be ignored.
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MySQL ON DUPLICATE KEY - last insert id?
...e.html
At the bottom of the page they explain how you can make LAST_INSERT_ID meaningful for updates by passing an expression to that MySQL function.
From the MySQL documentation example:
If a table contains an AUTO_INCREMENT column and INSERT ... UPDATE inserts a row, the LAST_INSERT_ID() func...
What is the difference between properties and attributes in HTML?
...a one-to-one relationship. For instance, for this HTML element:
<input id="the-input" type="text" value="Name:">
the corresponding DOM node will have id,type, and value properties (among others):
The id property is a reflected property for the id attribute: Getting the property reads the ...