AlchemistCamp
Ecto Migration to add JSONB index
How do you create an index on a JSONB field in an Ecto migration? I’m trying to do the equivalent of this:
CREATE TABLE comments(id INT, body TEXT, data JSONB);
CREATE INDEX ON comments((meta->'author'->>'id'));
What should I fill into the ??? below?
def change do
create table(:comments) do
add :meta, map
add :body, text
#...
timestamps()
end
create index(???, ???)
end
Note, that the meta is coming in is user generated, so I’m not 100% sure what the structure will be to begin with and will likely want to add more indexes as time goes by.
Marked As Solved
cblavier
If I were you, I would create the index with a raw SQL query. As in following PostGIS index creation
defmodule MyApp.AddPoiPostgisIndices do
use Ecto.Migration
def up do
execute("CREATE INDEX pois_coordinates_index ON pois USING GIST(coordinates);")
end
def down do
execute("DROP INDEX pois_coordinates_index")
end
end
Also Liked
AlchemistCamp
Looks straightforward enough. I’ll just drop my query into the execute like so:
execute("CREATE INDEX ON comments((meta->'author'->>'id'));")
Thanks!
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