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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]
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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
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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'
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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
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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.
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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 ...
Using LINQ to concatenate strings
...t takes a collection of values and returns a scalar value. Examples from T-SQL include min, max, and sum. Both VB and C# have support for aggregates. Both VB and C# support aggregates as extension methods. Using the dot-notation, one simply calls a method on an IEnumerable object.
Remember that agg...
How to load db:seed data into test database automatically?
...est:load is not executed if you have config.active_record.schema_format = :sql (db:test:clone_structure is)
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IsNothing versus Is Nothing
...d to use the Is Nothing version partially from using it as much as I do in SQL.
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