Require missing libraries and check for defined ActionController constant so ActionView can be used standalone

Signed-off-by: NMichael Koziarski <michael@koziarski.com>

When an unexpected exception is caught, tell the administrator to read the log file for more information about the error. This should make things less confusing for developers who are new to Rails.
Signed-off-by: NMichael Koziarski <michael@koziarski.com>

Signed-off-by: NMichael Koziarski <michael@koziarski.com>

Signed-off-by: NMichael Koziarski <michael@koziarski.com>

Back to fetching all versions in ruby instead of letting SQL do it as it's difficult to get all databases to convert the text value to a number with the same SQL
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Create mysql binary_fields table with latin1 character set as with utf8 all the limits would have to be divided by 3 to get the expected text types
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Include mysql older than 5.1.23 in the 5.1 series in the list of those that can't handle NULL defaults
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

[#905 state:resolved]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Use DECIMAL instead of INTEGER when casting as mysql doesn't work with just "INTEGER" and other databases don't like "UNSIGNED" which mysql requires

And don't mask exceptions.
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Cache migrated versions list in Migrator and use it to fetch the latest migrated version name [#845 state:resolved]

Also optimized Migrator#current_version class method to fetch
only the latest version number and not all of them.

With this change no matter how many migrations there are the
schema_migrations table is only SELECTed from once.
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

This matters when the has_one is defined with an order in which case
there is an expectation that the first one will be loaded.

[#904 state:resolved]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Harmonize framework require strategy. Don't add self to load path since Rails initializer and RubyGems handle it.

[#903 state:resolved]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>