PostGIS Error - PG::InternalError: ERROR: could not load library - ruby-on-rails

Question

StandardError: An error has occurred, this and all later migrations canceled:
PG::InternalError: ERROR: could not load library "/usr/local/Cellar/postgresql/9.4.5/lib/postgis-2.1.so": dlopen(/usr/local/Cellar/postgresql/9.4.5/lib/postgis-2.1.so, 10): Symbol not found: __ZN5boost7archive21basic_binary_iarchiveINS0_15binary_iarchiveEE13load_overrideERNS0_15class_name_typeEi
Referenced from: /usr/local/lib/libSFCGAL.1.dylib
Expected in: /usr/local/lib/libboost_serialization-mt.dylib
in /usr/local/lib/libSFCGAL.1.dylib
: CREATE EXTENSION IF NOT EXISTS "postgis"/Users/harshamv/Sites/clink/db/migrate/20150812164615_enable_postgis.rb:3:in `change'
-e:1:in `<main>'
ActiveRecord::StatementInvalid: PG::InternalError: ERROR: could not load library "/usr/local/Cellar/postgresql/9.4.5/lib/postgis-2.1.so": dlopen(/usr/local/Cellar/postgresql/9.4.5/lib/postgis-2.1.so, 10): Symbol not found: __ZN5boost7archive21basic_binary_iarchiveINS0_15binary_iarchiveEE13load_overrideERNS0_15class_name_typeEi
Referenced from: /usr/local/lib/libSFCGAL.1.dylib
Expected in: /usr/local/lib/libboost_serialization-mt.dylib
in /usr/local/lib/libSFCGAL.1.dylib
: CREATE EXTENSION IF NOT EXISTS "postgis"
/Users/harshamv/Sites/clink/db/migrate/20150812164615_enable_postgis.rb:3:in `change'
-e:1:in `<main>'
PG::InternalError: ERROR: could not load library "/usr/local/Cellar/postgresql/9.4.5/lib/postgis-2.1.so": dlopen(/usr/local/Cellar/postgresql/9.4.5/lib/postgis-2.1.so, 10): Symbol not found: __ZN5boost7archive21basic_binary_iarchiveINS0_15binary_iarchiveEE13load_overrideERNS0_15class_name_typeEi
Referenced from: /usr/local/lib/libSFCGAL.1.dylib
Expected in: /usr/local/lib/libboost_serialization-mt.dylib
in /usr/local/lib/libSFCGAL.1.dylib
/Users/harshamv/Sites/clink/db/migrate/20150812164615_enable_postgis.rb:3:in `change'
-e:1:in `<main>'
Am getting the above error all of sudden when i tried to drop and recreate my Rails-PostgreSQL

Answer 1

You probably recently upgraded the boost Homebrew formula doing a brew update / brew upgrade, and it seems the latest version is not playing well with postgis.
I fixed a very similar issue by going back to the previous version of boost with:
brew switch boost 1.58.0
UPDATE: now that this was fixed in Homebrew, the answer below suggesting to do a simple update / upgrade is probably the way to go. If you did switch previously, you can now brew switch boost 1.59.0 to upgrade to the latest version of boost, you might also have to brew reinstall postgis.

Answer 2

This issue has been fixed here. Re-install and it should work.
$ brew update && upgrade
$ brew install postgis

Answer 3

Couldn't find 1.58.0 either, but 1.55.0_1 is available and successfully installed postgis for me. These entries in effectif and stackoverflow were very helpful. The process may have extra steps.
Just to be sure:
$ brew uninstall postgis
Tap to homebrew versions, if not having it yet:
$ brew tap homebrew/versions
Find the newest available:
$ brew search boost
...
homebrew/versions/boost155
...
$ brew install homebrew/versions/boost155
This installs boost under a different formula (boost155). To be able to switch versions, I symlinked the old version to the boost directory:
$ ln -s /usr/local/Cellar/boost155/1.55.0_1 /usr/local/Cellar/boost/1.55.0_1
After this it is business as usual:
$ brew switch boost 1.55.0_1
$ brew install postgis

Answer 4

If you need to install a specific version of a formula, take a look at this thread:
Homebrew: install specific version of formula

Answer 5

I just ran into this problem as well, and version 1.56.0 of boostwas available and solved the issue for me. Looks like the problem is specifically with 1.58.0.