Robert Walker wrote:
> Example:
>
> CREATE TABLE properties (
> namespace CHAR(50),
> name CHAR(50),
> value VARCHAR(100),
> );
> execute <<-SQL
> ALTER TABLE products
> ADD CONSTRAINT my_constraint UNIQUE (namespace, name)
> SQL
Oops, I didn't notice your original post was not in migration syntax:
Better example:
def self.up
create_table :products do |t|
t.references :category
end
#add unique constraint
execute <<-SQL
ALTER TABLE products
ADD CONSTRAINT my_constraint UNIQUE (namespace, name)
SQL
end
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