Class: Superstore::Adapters::JsonbAdapter
Defined Under Namespace
Classes: QueryBuilder
Constant Summary
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- PRIMARY_KEY_COLUMN =
'id'.freeze
- OJ_OPTIONS =
{mode: :compat}
Instance Attribute Summary
#config
Instance Method Summary
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#batch, #batching?, #execute_batchable, #initialize
Instance Method Details
#active_record_klass ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 100
def active_record_klass
@active_record_klass ||= ActiveRecord::Base
end
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#active_record_klass=(klass) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 96
def active_record_klass=(klass)
@active_record_klass = klass
end
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#connection ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 92
def connection
active_record_klass.connection
end
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#create_ids_where_clause(ids) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 176
def create_ids_where_clause(ids)
ids = ids.first if ids.is_a?(Array) && ids.one?
if ids.is_a?(Array)
id_list = ids.map { |id| quote(id) }.join(',')
"#{primary_key_column} IN (#{id_list})"
else
"#{primary_key_column} = #{quote(ids)}"
end
end
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#create_table(table_name, options = {}) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 164
def create_table(table_name, options = {})
ActiveRecord::Migration.create_table table_name, id: false do |t|
t.string :id, null: false
t.jsonb :document, null: false
end
connection.execute "ALTER TABLE \"#{table_name}\" ADD CONSTRAINT #{table_name}_pkey PRIMARY KEY (id)"
end
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#delete(table, ids) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 152
def delete(table, ids)
statement = "DELETE FROM #{table} WHERE #{create_ids_where_clause(ids)}"
execute_batchable statement
end
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#drop_table(table_name) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 172
def drop_table(table_name)
ActiveRecord::Migration.drop_table table_name
end
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#execute(statement) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 104
def execute(statement)
connection.execute statement
end
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#execute_batch(statements) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 158
def execute_batch(statements)
connection.transaction do
execute(statements * ";\n")
end
end
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#fields_to_postgres_array(fields) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 191
def fields_to_postgres_array(fields)
quoted_fields = fields.map { |field| quote(field) }.join(',')
"ARRAY[#{quoted_fields}]"
end
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#insert(table, id, attributes) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 137
def insert(table, id, attributes)
not_nil_attributes = attributes.reject { |key, value| value.nil? }
statement = "INSERT INTO #{table} (#{primary_key_column}, document) VALUES (#{quote(id)}, #{to_quoted_jsonb(not_nil_attributes)})"
execute_batchable statement
end
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#primary_key_column ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 88
def primary_key_column
PRIMARY_KEY_COLUMN
end
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#quote(value) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 187
def quote(value)
connection.quote(value)
end
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 121
def scroll(scope, batch_size)
statement = QueryBuilder.new(self, scope).to_query
cursor_name = "cursor_#{SecureRandom.hex(6)}"
fetch_sql = "FETCH FORWARD #{batch_size} FROM #{cursor_name}"
connection.transaction do
connection.execute "DECLARE #{cursor_name} NO SCROLL CURSOR FOR (#{statement})"
while (batch = connection.execute(fetch_sql)).any?
batch.each do |result|
yield result[primary_key_column], Oj.compat_load(result['document'])
end
end
end
end
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#select(scope) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 113
def select(scope)
statement = QueryBuilder.new(self, scope).to_query
connection.execute(statement).each do |result|
yield result[primary_key_column], Oj.compat_load(result['document'])
end
end
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#to_ids(scope) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 108
def to_ids(scope)
statement = QueryBuilder.new(self, scope.select(primary_key_column)).to_query
connection.select_values(statement)
end
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#to_quoted_jsonb(data) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 197
def to_quoted_jsonb(data)
"#{quote(Oj.dump(data, OJ_OPTIONS))}::JSONB"
end
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#update(table, id, attributes) ⇒ Object
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# File 'lib/superstore/adapters/jsonb_adapter.rb', line 143
def update(table, id, attributes)
return if attributes.empty?
value_update = "jsonb_strip_nulls(document || #{to_quoted_jsonb(attributes)})"
statement = "UPDATE #{table} SET document = #{value_update} WHERE #{primary_key_column} = #{quote(id)}"
execute_batchable statement
end
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