大约有 3,551 项符合查询结果（耗时：0.0257秒） [XML]
Change from SQLite to PostgreSQL in a fresh Rails project
I have a rails app that's databases are in SQLite (The dev and production). Since I am moving to heroku, I want to convert my database to PostgreSQL.
...
How to get the nth occurrence in a string?
...it. A different though critical example: always enclose data when doing an SQL INSERT as mysqli_real_escape_string does not protect against single quote hacks. Much of professional coding is not just having good habits though also understanding why such habits are important. :-)
...
No mapping found for field in order to sort on in ElasticSearch
.... I was assuming it would treat null as being at the start or end (as with SQL ordering) but I believe it also triggers this error.
So if you see this error, you may need to ensure the sort attribute has a default value when it's sent to ElasticSearch.
I had this error with Rails+ElasticSearch+Tir...
How do I make a column unique and index it in a Ruby on Rails migration?
...or fine-grained control, there's a "execute" method that executes straight SQL.
That's it!
If you are doing this as a replacement for regular old model validations, check to see how it works. The error reporting to the user will likely not be as nice without model-level validations. You can always...
Recommended Fonts for Programming? [closed]
...
I use Consolas for everything, including Notepad++, SQL Studio, Eclipse, etc. I wish there was a Mac version. Also, if you notice, the text area field on Stack Overflow uses Consolas, so we have some other fans out there as well :p
...
Case-insensitive search in Rails model
... Thanks for the credit on creating the case-insensitive index in PostgreSQL. Credit back to you for showing how to use it in Rails! One additional note: if you use a standard finder, e.g. find_by_name, it still does an exact match. You have to write custom finders, similar to your "query" line a...
Could not load file or assembly 'System.Data.SQLite'
...
System.Data.SQLite.dll is a mixed assembly, i.e. it contains both managed code and native code. Therefore a particular System.Data.SQLite.dll is either x86 or x64, but never both.
Update (courtesy J. Pablo Fernandez): Cassini, the deve...
Fragment is not being replaced but put on top of the previous one
... your explanation. youtube.com/watch?v=EbcdMxAIr54
– SQL and Java Learner
Oct 17 '18 at 18:48
add a comment
|
...
The most sophisticated way for creating comma-separated Strings from a Collection/Array/List?
...question on stackoverflow dealing with how to insert a list of ids into an SQL statement.
share
|
improve this answer
|
follow
|
...
How to load json into my angular.js ng-model?
...s a list of Customer details, from an online copy of Microsoft's Northwind SQL Server database.
http://www.iNorthwind.com/Service1.svc/getAllCustomers
It returns some JSON data which looks like this:
{
"GetAllCustomersResult" :
[
{
"CompanyName": "Alfreds ...