Image Histogram App! ... not working on Heroku

# Image Histogram

Runs fine locally, but having database problems (see below)* on Heroku: 

https://image-histogram.herokuapp.com/

See the screenshot uploaded.

https://github.com/r-c-s/persist/blob/master/Screenshot%20from%202014-11-03%2015:43:53.png



I am reusing my previous Node.js application as the backend REST API for computing the image histogram. 

https://image-histogram-api.herokuapp.com/

e.g.:

curl -X POST -d '{"imageUrl":"imageUrlGoesHere"}' -H "Content-Type: application/json" image-histogram-api.herokuapp.com/histogram 

This does work fine.


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*Postgres error message when running on Heroku:

PG::StringDataRightTruncation: ERROR: value too long for type character varying(255) : INSERT INTO "image_histogram_records" ("author", "created_at", "histogram", "image_name", "image_url", "updated_at") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id"