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CORS Access-Control-Allow-Headers wildcard being ignored?
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Support for wildcards in the Access-Control-Allow-Headers header was added to the living standard only in May 2016, so it may not be supported by all browsers. On browser which don't implement this yet, it must be an exact match: htt...
belongs_to through associations
...have been attempting to use belongs_to :question, through: :answer to perform this action.
7 Answers
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How to generate a simple popup using jQuery
...ack);
};
And finally the html:
<div class="messagepop pop">
<form method="post" id="new_message" action="/messages">
<p><label for="email">Your email or name</label><input type="text" size="30" name="email" id="email" /></p>
<p><label f...
Rails Object to hash
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If you are looking for only attributes, then you can get them by:
@post.attributes
Note that this calls ActiveModel::AttributeSet.to_hash every time you invoke it, so if you need to access the hash multiple times you should cache it in a local...
Why shouldn't I use mysql_* functions in PHP?
What are the technical reasons for why one shouldn't use mysql_* functions? (e.g. mysql_query() , mysql_connect() or mysql_real_escape_string() )?
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EF Code First foreign key without navigation property
...s impossible. You always need at least one navigation property to create a foreign key constraint in the database.
If you are using Code First Migrations you have the option to add a new code based migration on the package manager console (add-migration SomeNewSchemaName). If you changed something ...
Django Reverse with arguments '()' and keyword arguments '{}' not found
... Remember that any arguments that are passed need to be assigned a value before being reversed. Just use the correct namespace, which in this case is 'edit_project'.
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How can I rename a field for all documents in MongoDB?
...}. You need the multi:true to update all your records.
Or you can use the former way:
remap = function (x) {
if (x.additional){
db.foo.update({_id:x._id}, {$set:{"name.last":x.name.additional}, $unset:{"name.additional":1}});
}
}
db.foo.find().forEach(remap);
In MongoDB 3.2 you can also...
Condition within JOIN or WHERE
Is there any difference (performance, best-practice, etc...) between putting a condition in the JOIN clause vs. the WHERE clause?
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JPA EntityManager: Why use persist() over merge()?
...arts
em.persist(e);
e.setSomeField(someValue);
// tran ends, and the row for someField is updated in the database
// scenario 2
// tran starts
e = new MyEntity();
em.merge(e);
e.setSomeField(anotherValue);
// tran ends but the row for someField is not updated in the database
// (you made the cha...