Schema validation error when using enum in two tables

[artem-barmin]

I have following schema:

create type user_opinion as enum ('pro','cons');
create table user_view(id serial primary key,view user_opinion);
create table argument(id serial primary key,side user_opinion);

When I am trying to start postgraphql it gives me error:

Error: Schema must contain unique named types but contains multiple types named "UserOpinion".
    at invariant (/usr/lib/node_modules/postgraphql/node_modules/graphql/jsutils/invariant.js:19:11)
    at typeMapReducer (/usr/lib/node_modules/postgraphql/node_modules/graphql/type/schema.js:207:29)
    at /usr/lib/node_modules/postgraphql/node_modules/graphql/type/schema.js:234:22
    at Array.forEach (native)
    at /usr/lib/node_modules/postgraphql/node_modules/graphql/type/schema.js:225:37
    at typeMapReducer (/usr/lib/node_modules/postgraphql/node_modules/graphql/type/schema.js:236:7)
    at /usr/lib/node_modules/postgraphql/node_modules/graphql/type/schema.js:234:22
    at Array.forEach (native)
    at /usr/lib/node_modules/postgraphql/node_modules/graphql/type/schema.js:225:37
    at typeMapReducer (/usr/lib/node_modules/postgraphql/node_modules/graphql/type/schema.js:236:7)
    at Array.reduce (native)
    at new GraphQLSchema (/usr/lib/node_modules/postgraphql/node_modules/graphql/type/schema.js:104:34)
    at schema (/usr/lib/node_modules/postgraphql/dist/graphql/createSchema.js:25:39)
    at /usr/lib/node_modules/postgraphql/dist/createGraphqlSchema.js:32:57
    at next (native)
    at step (/usr/lib/node_modules/postgraphql/dist/createGraphqlSchema.js:17:191)

Schema validator works using reference comparison(===), so that can be fixed by using cache by name for enum types in https://github.com/calebmer/postgraphql/blob/master/src/graphql/getColumnType.js#L113.

[calebmer]

Fixed in 1.2.2 with #35, thanks so much!