I have a Postgres database with PostGIS extension and some geo-data in it. I need to generate tiles with custom SQL queries (using ST_...
functions), that returns binary data ( bytea
, like \\x1a320a0474657374121d12020000180322150946ec3f1a14453b0a09280f091413121e09091e0f1a026331220228012880207802
). And I need to send this data from my Rails controller to the requester, with the headers like 'Content-Type: x-application/protobuf'
.
So, my question is:
1) How to get the binary data from the Database ( Sequel
, ActiveRecord::Base.connection.execute
?) 2) How to return this data in the controller action? ( send_data ..., tyle: ''
?)
Thanks!
I just figured out the solution - hope it helps, although it's a long time ago..
records_array = ActiveRecord::Base.connection.execute(query)
result = records_array[0]['st_asmvt']
encoded = ActiveRecord::Base.connection.unescape_bytea(result)
ActiveRecord::Base.connection.unescape_bytea
is the answer.
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