unleash.unleash/src/migrations/20221107121635-move-variants-to-per-environment.js

'use strict';

exports.up = function (db, callback) {
    db.runSql(
        `
            ALTER TABLE feature_environments ADD COLUMN variants JSONB DEFAULT '[]'::jsonb NOT NULL;
            WITH feature_variants AS (SELECT variants, name FROM features)
            UPDATE feature_environments SET variants = feature_variants.variants FROM feature_variants WHERE feature_name = feature_variants.name;

            CREATE VIEW features_view AS
            SELECT
                features.name as name,
                features.description as description,
                features.type as type,
                features.project as project,
                features.stale as stale,
                feature_environments.variants as variants,
                features.impression_data as impression_data,
                features.created_at as created_at,
                features.last_seen_at as last_seen_at,
                features.archived_at as archived_at,
                feature_environments.enabled as enabled,
                feature_environments.environment as environment,
                environments.name as environment_name,
                environments.type as environment_type,
                environments.sort_order as environment_sort_order,
                feature_strategies.id as strategy_id,
                feature_strategies.strategy_name as strategy_name,
                feature_strategies.parameters as parameters,
                feature_strategies.constraints as constraints,
                feature_strategies.sort_order as sort_order,
                fss.segment_id as segments
            FROM
                features
            LEFT JOIN feature_environments ON feature_environments.feature_name = features.name
            LEFT JOIN feature_strategies ON feature_strategies.feature_name = feature_environments.feature_name
            and feature_strategies.environment = feature_environments.environment
            LEFT JOIN environments ON feature_environments.environment = environments.name
            LEFT JOIN feature_strategy_segment as fss ON fss.feature_strategy_id = feature_strategies.id;
        `,
        callback,
    );
};

exports.down = function (db, callback) {
    db.runSql(
        `
            DROP VIEW features_view;
            ALTER TABLE feature_environments DROP COLUMN variants;
        `,
        callback,
    );
};