Class: Sequel::Postgres::HStoreOp

### Home Classes Methods

### In Files

- lib/sequel/extensions/pg_hstore_ops.rb

### Parent

Sequel::SQL::Wrapper

### Methods

- #-
- #[]
- #akeys
- #avals
- #concat
- #contain_all
- #contain_any
- #contained_by
- #contains
- #defined
- #delete
- #each
- #exist?
- #has_key?
- #hstore
- #include?
- #key?
- #keys
- #member?
- #merge
- #populate
- #record_set
- #skeys
- #slice
- #svals
- #to_array
- #to_matrix
- #values

### Files

- CHANGELOG
- MIT-LICENSE
- README.rdoc
- active_record.rdoc
- advanced_associations.rdoc
- association_basics.rdoc
- bin_sequel.rdoc
- cheat_sheet.rdoc
- code_order.rdoc
- core_extensions.rdoc
- dataset_basics.rdoc
- dataset_filtering.rdoc
- extensions.rdoc
- mass_assignment.rdoc
- migration.rdoc
- model_hooks.rdoc
- model_plugins.rdoc
- mssql_stored_procedures.rdoc
- object_model.rdoc
- opening_databases.rdoc
- postgresql.rdoc
- prepared_statements.rdoc
- querying.rdoc
- reflection.rdoc
- 1.0.txt
- 1.1.txt
- 1.3.txt
- 1.4.0.txt
- 1.5.0.txt
- 2.0.0.txt
- 2.1.0.txt
- 2.10.0.txt
- 2.11.0.txt
- 2.12.0.txt
- 2.2.0.txt
- 2.3.0.txt
- 2.4.0.txt
- 2.5.0.txt
- 2.6.0.txt
- 2.7.0.txt
- 2.8.0.txt
- 2.9.0.txt
- 3.0.0.txt
- 3.1.0.txt
- 3.10.0.txt
- 3.11.0.txt
- 3.12.0.txt
- 3.13.0.txt
- 3.14.0.txt
- 3.15.0.txt
- 3.16.0.txt
- 3.17.0.txt
- 3.18.0.txt
- 3.19.0.txt
- 3.2.0.txt
- 3.20.0.txt
- 3.21.0.txt
- 3.22.0.txt
- 3.23.0.txt
- 3.24.0.txt
- 3.25.0.txt
- 3.26.0.txt
- 3.27.0.txt
- 3.28.0.txt
- 3.29.0.txt
- 3.3.0.txt
- 3.30.0.txt
- 3.31.0.txt
- 3.32.0.txt
- 3.33.0.txt
- 3.34.0.txt
- 3.35.0.txt
- 3.36.0.txt
- 3.37.0.txt
- 3.38.0.txt
- 3.39.0.txt
- 3.4.0.txt
- 3.40.0.txt
- 3.41.0.txt
- 3.42.0.txt
- 3.43.0.txt
- 3.44.0.txt
- 3.45.0.txt
- 3.46.0.txt
- 3.47.0.txt
- 3.48.0.txt
- 3.5.0.txt
- 3.6.0.txt
- 3.7.0.txt
- 3.8.0.txt
- 3.9.0.txt
- 4.0.0.txt
- 4.1.0.txt
- 4.10.0.txt
- 4.11.0.txt
- 4.12.0.txt
- 4.13.0.txt
- 4.14.0.txt
- 4.15.0.txt
- 4.16.0.txt
- 4.17.0.txt
- 4.18.0.txt
- 4.19.0.txt
- 4.2.0.txt
- 4.20.0.txt
- 4.3.0.txt
- 4.4.0.txt
- 4.5.0.txt
- 4.6.0.txt
- 4.7.0.txt
- 4.8.0.txt
- 4.9.0.txt
- schema_modification.rdoc
- security.rdoc
- sharding.rdoc
- sql.rdoc
- testing.rdoc
- thread_safety.rdoc
- transactions.rdoc
- validations.rdoc
- virtual_rows.rdoc

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- Sequel::Postgres::EnumDatabaseMethods
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- Sequel::Postgres::HStore::DatabaseMethods
- Sequel::Postgres::HStore::Parser
- Sequel::Postgres::HStoreOp
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- Sequel::Postgres::InetDatabaseMethods
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- Sequel::Postgres::PGArray::JSONCreator
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- Sequel::Postgres::PGRange::DatasetMethods
- Sequel::Postgres::PGRange::Parser
- Sequel::Postgres::PGRow
- Sequel::Postgres::PGRow::ArrayRow
- Sequel::Postgres::PGRow::DatabaseMethods
- Sequel::Postgres::PGRow::HashRow
- Sequel::Postgres::PGRow::Parser
- Sequel::Postgres::PGRow::Splitter
- Sequel::Postgres::PGRowOp
- Sequel::Postgres::PGRowOp::ExpressionMethods
- Sequel::Postgres::RangeOp
- Sequel::Postgres::RangeOpMethods
- Sequel::Postgres::StaticCacheUpdater
- Sequel::PrettyTable
- Sequel::Progress
- Sequel::Progress::DatabaseMethods
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No matching classes.

# Sequel::Postgres::HStoreOp

The HStoreOp class is a simple container for a single object that defines methods that yield Sequel expression objects representing PostgreSQL hstore operators and functions.

In the method documentation examples, assume that:

    hstore_op = :hstore.hstore

### Constants

CONCAT
CONTAINED_BY
CONTAINS
CONTAIN_ALL
CONTAIN_ANY
HAS_KEY
LOOKUP
RECORD_SET

### Public Instance Methods

-(other) click to toggle source

Delete entries from an hstore using the subtraction operator:

    hstore_op - 'a' # (hstore - 'a')

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 92
    def -(other)
      other = if other.is_a?(String) && !other.is_a?(Sequel::LiteralString)
        Sequel.cast_string(other)
      else
        wrap_input_array(wrap_input_hash(other))
      end
      HStoreOp.new(super)
    end

[](key) click to toggle source

Lookup the value for the given key in an hstore:

    hstore_op['a'] # (hstore -> 'a')

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 104
    def [](key)
      v = Sequel::SQL::PlaceholderLiteralString.new(LOOKUP, [value, wrap_input_array(key)])
      if key.is_a?(Array) || (defined?(Sequel::Postgres::PGArray) && key.is_a?(Sequel::Postgres::PGArray)) || (defined?(Sequel::Postgres::ArrayOp) && key.is_a?(Sequel::Postgres::ArrayOp))
        wrap_output_array(v)
      else
        Sequel::SQL::StringExpression.new(:NOOP, v)
      end
    end

akeys() click to toggle source
Alias for: keys
avals() click to toggle source
Alias for: values
concat(other) click to toggle source
Alias for: merge
contain_all(other) click to toggle source

Check if the receiver contains all of the keys in the given array:

    hstore_op.contain_all(:a) # (hstore ?& a)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 116
    def contain_all(other)
      bool_op(CONTAIN_ALL, wrap_input_array(other))
    end

contain_any(other) click to toggle source

Check if the receiver contains any of the keys in the given array:

    hstore_op.contain_any(:a) # (hstore ?| a)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 123
    def contain_any(other)
      bool_op(CONTAIN_ANY, wrap_input_array(other))
    end

contained_by(other) click to toggle source

Check if the other hstore contains all entries in the receiver:

    hstore_op.contained_by(:h) # (hstore <@ h)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 137
    def contained_by(other)
      bool_op(CONTAINED_BY, wrap_input_hash(other))
    end

contains(other) click to toggle source

Check if the receiver contains all entries in the other hstore:

    hstore_op.contains(:h) # (hstore @> h)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 130
    def contains(other)
      bool_op(CONTAINS, wrap_input_hash(other))
    end

defined(key) click to toggle source

Check if the receiver contains a non-NULL value for the given key:

    hstore_op.defined('a') # defined(hstore, 'a')

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 144
    def defined(key)
      Sequel::SQL::BooleanExpression.new(:NOOP, function(:defined, key))
    end

delete(key) click to toggle source

Delete the matching entries from the receiver:

    hstore_op.delete('a') # delete(hstore, 'a')

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 151
    def delete(key)
      HStoreOp.new(function(:delete, wrap_input_array(wrap_input_hash(key))))
    end

each() click to toggle source

Transform the receiver into a set of keys and values:

    hstore_op.each # each(hstore)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 158
    def each
      function(:each)
    end

exist?(key) click to toggle source
Alias for: has_key?
has_key?(key) click to toggle source

Check if the receiver contains the given key:

    hstore_op.has_key?('a') # (hstore ? 'a')

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 165
    def has_key?(key)
      bool_op(HAS_KEY, key)
    end

Also aliased as: include?, key?, member?, exist?
hstore() click to toggle source

Return the receiver.

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 174
    def hstore
      self
    end

include?(key) click to toggle source
Alias for: has_key?
key?(key) click to toggle source
Alias for: has_key?
keys() click to toggle source

Return the keys as a PostgreSQL array:

    hstore_op.keys # akeys(hstore)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 181
    def keys
      wrap_output_array(function(:akeys))
    end

Also aliased as: akeys
member?(key) click to toggle source
Alias for: has_key?
merge(other) click to toggle source

Merge a given hstore into the receiver:

    hstore_op.merge(:a) # (hstore || a)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 189
    def merge(other)
      HStoreOp.new(Sequel::SQL::PlaceholderLiteralString.new(CONCAT, [self, wrap_input_hash(other)]))
    end

Also aliased as: concat
populate(record) click to toggle source

Create a new record populated with entries from the receiver:

    hstore_op.populate(:a) # populate_record(a, hstore)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 197
    def populate(record)
      SQL::Function.new(:populate_record, record, self)
    end

record_set(record) click to toggle source

Update the values in a record using entries in the receiver:

    hstore_op.record_set(:a) # (a #= hstore)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 204
    def record_set(record)
      Sequel::SQL::PlaceholderLiteralString.new(RECORD_SET, [record, value])
    end

skeys() click to toggle source

Return the keys as a PostgreSQL set:

    hstore_op.skeys # skeys(hstore)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 211
    def skeys
      function(:skeys)
    end

slice(keys) click to toggle source

Return an hstore with only the keys in the given array:

    hstore_op.slice(:a) # slice(hstore, a)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 218
    def slice(keys)
      HStoreOp.new(function(:slice, wrap_input_array(keys)))
    end

svals() click to toggle source

Return the values as a PostgreSQL set:

    hstore_op.svals # svals(hstore)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 225
    def svals
      function(:svals)
    end

to_array() click to toggle source

Return a flattened array of the receiver with alternating keys and values:

    hstore_op.to_array # hstore_to_array(hstore)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 233
    def to_array
      wrap_output_array(function(:hstore_to_array))
    end

to_matrix() click to toggle source

Return a nested array of the receiver, with arrays of 2 element (key/value) arrays:

    hstore_op.to_matrix # hstore_to_matrix(hstore)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 241
    def to_matrix
      wrap_output_array(function(:hstore_to_matrix))
    end

values() click to toggle source

Return the values as a PostgreSQL array:

    hstore_op.values # avals(hstore)

    # File lib/sequel/extensions/pg_hstore_ops.rb, line 248
    def values
      wrap_output_array(function(:avals))
    end

Also aliased as: avals

[Validate]

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