Fixes underscore treated as wildcard in emails #193
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The 'nocase' modifier must use a LIKE query under
the hood, at least in MySQL backends. Emails like
'me2@me.com' and 'm_2@me.com' should not match,
but they do with `filter('Email:nocase')`
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Duplicate of #178 but rebased on latest, reopening to hopefully get traction. Even if it's due to a framework issue under the hood, this alternative certainly works.
In a project we are using this module, and having issues with users unable to sign up if their email address has an underscore in it and closely matches an existing email in the system. After a bit of digging, I found that the LIKE operator in Postgres and MySQL uses underscore as a single character wildcard.
It seems the SilverStripe ORM's 'nocase' modifier must use a LIKE query under the hood, at least in MySQL backends.
Email addresses like 'me2@me.com' and 'm_2@me.com' should not match, but they do with filter('Email:nocase')