Class: Cassanity::ColumnFamily
- Inherits:
-
Object
- Object
- Cassanity::ColumnFamily
- Defined in:
- lib/cassanity/column_family.rb
Instance Attribute Summary collapse
-
#executor ⇒ Object
readonly
Private.
-
#keyspace ⇒ Object
readonly
Public.
-
#name ⇒ Object
readonly
Public.
-
#schema ⇒ Object
readonly
Internal.
Instance Method Summary collapse
-
#alter(args = {}) ⇒ Object
Public: Alters the column family.
-
#create(args = {}) ⇒ Object
Public: Creates the column family in the keyspace based on the schema.
-
#create_index(args = {}) ⇒ Object
Public: Creates an index.
-
#delete(args = {}) ⇒ Object
Public: Makes it possible to delete data from the column family.
-
#drop(args = {}) ⇒ Object
Public: Drops the column family.
-
#drop_index(args = {}) ⇒ Object
Public: Drops an index.
-
#exists? ⇒ Boolean
(also: #exist?)
Public: Returns true or false depending on if column family exists in the keyspace.
-
#initialize(args = {}) ⇒ ColumnFamily
constructor
Public: Initializes a ColumnFamily.
-
#insert(args = {}) ⇒ Object
Public: Makes it possible to insert data into the column family.
-
#recreate ⇒ Object
Public: Drops column family if it exists and then calls create.
-
#select(args = {}) ⇒ Object
Public: Makes it possible to query data from the column family.
-
#truncate(args = {}) ⇒ Object
Public: Truncates the column family.
-
#update(args = {}) ⇒ Object
Public: Makes it possible to update data in the column family.
Constructor Details
#initialize(args = {}) ⇒ ColumnFamily
Public: Initializes a ColumnFamily.
args - The Hash of arguments (default: {}).
:name - The String name of the column family.
:keyspace - The Cassanity::Keyspace the column family is in.
:executor - What will execute the queries (optional).
Must respond to `call`.
:schema - The schema used to create the column family (optional).
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# File 'lib/cassanity/column_family.rb', line 26 def initialize(args = {}) @name = args.fetch(:name) @keyspace = args.fetch(:keyspace) @executor = args.fetch(:executor) { @keyspace.executor } @schema = args[:schema] end |
Instance Attribute Details
#executor ⇒ Object (readonly)
Private
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# File 'lib/cassanity/column_family.rb', line 12 def executor @executor end |
#keyspace ⇒ Object (readonly)
Public
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# File 'lib/cassanity/column_family.rb', line 9 def keyspace @keyspace end |
#name ⇒ Object (readonly)
Public
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# File 'lib/cassanity/column_family.rb', line 6 def name @name end |
#schema ⇒ Object (readonly)
Internal
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# File 'lib/cassanity/column_family.rb', line 15 def schema @schema end |
Instance Method Details
#alter(args = {}) ⇒ Object
Public: Alters the column family.
args - The Hash of arguments to pass to the argument generator
(default: {}). :name and :keyspace_name are always included.
Examples
alter(alter: {created_at: :timestamp})
alter(add: {description: :text})
alter(drop: :description)
alter(with: {read_repair_chance: 0.2})
Returns whatever is returned by executor.
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# File 'lib/cassanity/column_family.rb', line 138 def alter(args = {}) @executor.call({ command: :column_family_alter, arguments: args.merge({ name: @name, keyspace_name: @keyspace.name, }), }) end |
#create(args = {}) ⇒ Object
Public: Creates the column family in the keyspace based on the schema.
args - The Hash of arguments to pass to the executor. Always passes
:name and :keyspace_name.
:schema - The Schema to use to create the column family
(defaults to schema provided during initialization).
Examples
create # uses schema from initialization
create(schema: Cassanity::Schema.new(...))
Returns nothing. Raises Cassanity::Error if schema not set during initialization and also
not passed in via arguments.
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# File 'lib/cassanity/column_family.rb', line 71 def create(args = {}) forced_arguments = { name: @name, keyspace_name: @keyspace.name, } arguments = args.merge(forced_arguments) arguments[:schema] = schema unless arguments[:schema] @executor.call({ command: :column_family_create, arguments: arguments, }) end |
#create_index(args = {}) ⇒ Object
Public: Creates an index
args - The Hash of arguments to pass to the argument generator
(default: {}). :column_family_name and :keyspace_name are
always included.
Examples
create_index(column_name: 'ability_id')
create_index(name: 'ability_index', column_name: 'ability_id')
Returns whatever is returned by executor.
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# File 'lib/cassanity/column_family.rb', line 160 def create_index(args = {}) @executor.call({ command: :index_create, arguments: args.merge({ column_family_name: @name, keyspace_name: @keyspace.name, }), }) end |
#delete(args = {}) ⇒ Object
Public: Makes it possible to delete data from the column family.
args - The Hash of arguments to pass to the argument generator
(default: {}). :name and :keyspace_name are always included.
Returns whatever is returned by executor.
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# File 'lib/cassanity/column_family.rb', line 241 def delete(args = {}) @executor.call({ command: :column_family_delete, arguments: args.merge({ name: @name, keyspace_name: @keyspace.name, }), }) end |
#drop(args = {}) ⇒ Object
Public: Drops the column family.
args - The Hash of arguments to pass to the argument generator
(default: {}). :name and :keyspace_name are always included.
Examples
drop # you should rarely need more than this
Returns whatever is returned by executor.
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# File 'lib/cassanity/column_family.rb', line 115 def drop(args = {}) @executor.call({ command: :column_family_drop, arguments: args.merge({ name: @name, keyspace_name: @keyspace.name, }), }) end |
#drop_index(args = {}) ⇒ Object
Public: Drops an index
args - The Hash of arguments to pass to the argument generator
(default: {}).
Examples
drop_index(name: 'my_index_name')
Returns whatever is returned by executor.
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# File 'lib/cassanity/column_family.rb', line 180 def drop_index(args = {}) @executor.call({ command: :index_drop, arguments: args, }) end |
#exists? ⇒ Boolean Also known as: exist?
Public: Returns true or false depending on if column family exists in the keyspace.
Returns true if column family exists, false if it does not.
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# File 'lib/cassanity/column_family.rb', line 37 def exists? @executor.call({ command: :column_families, arguments: { keyspace_name: @keyspace.name, } }).any? { |row| row['columnfamily'].to_s == @name.to_s } end |
#insert(args = {}) ⇒ Object
Public: Makes it possible to insert data into the column family.
args - The Hash of arguments to pass to the argument generator
(default: {}). :name and :keyspace_name are always included.
Returns whatever is returned by executor.
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# File 'lib/cassanity/column_family.rb', line 209 def insert(args = {}) @executor.call({ command: :column_family_insert, arguments: args.merge({ name: @name, keyspace_name: @keyspace.name, }), }) end |
#recreate ⇒ Object
Public: Drops column family if it exists and then calls create.
Returns nothing.
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# File 'lib/cassanity/column_family.rb', line 51 def recreate drop if exists? create end |
#select(args = {}) ⇒ Object
Public: Makes it possible to query data from the column family.
args - The Hash of arguments to pass to the argument generator
(default: {}). :name and :keyspace_name are always included.
Returns whatever is returned by executor.
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# File 'lib/cassanity/column_family.rb', line 193 def select(args = {}) @executor.call({ command: :column_family_select, arguments: args.merge({ name: @name, keyspace_name: @keyspace.name, }) }) end |
#truncate(args = {}) ⇒ Object
Public: Truncates the column family.
args - The Hash of arguments to pass to the argument generator
(default: {}). :name and :keyspace_name are always included.
Examples
truncate # you should rarely need more than this
Returns whatever is returned by executor.
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# File 'lib/cassanity/column_family.rb', line 95 def truncate(args = {}) @executor.call({ command: :column_family_truncate, arguments: args.merge({ name: @name, keyspace_name: @keyspace.name, }), }) end |
#update(args = {}) ⇒ Object
Public: Makes it possible to update data in the column family.
args - The Hash of arguments to pass to the argument generator
(default: {}). :name and :keyspace_name are always included.
Returns whatever is returned by executor.
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# File 'lib/cassanity/column_family.rb', line 225 def update(args = {}) @executor.call({ command: :column_family_update, arguments: args.merge({ name: @name, keyspace_name: @keyspace.name, }), }) end |