Module: DynamicMigrations::Postgres::Server::Database::LoadedSchemas

Included in:
DynamicMigrations::Postgres::Server::Database
Defined in:
lib/dynamic_migrations/postgres/server/database/loaded_schemas.rb

Defined Under Namespace

Classes: LoadedSchemaAlreadyExistsError, LoadedSchemaDoesNotExistError

Instance Method Summary collapse

Instance Method Details

#add_loaded_schema(schema_name) ⇒ Object

adds a new loaded schema for this database

Raises:



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# File 'lib/dynamic_migrations/postgres/server/database/loaded_schemas.rb', line 15

def add_loaded_schema schema_name
  raise ExpectedSymbolError, schema_name unless schema_name.is_a? Symbol
  if has_loaded_schema? schema_name
    raise LoadedSchemaAlreadyExistsError, "Loaded schema #{schema_name} already exists"
  end
  included_target = self
  if included_target.is_a? Database
    new_schema = @loaded_schemas[schema_name] = Schema.new :database, included_target, schema_name
  else
    raise ModuleIncludedIntoUnexpectedTargetError, included_target
  end
  # sort the hash so that the schemas are in alphabetical order by name
  sorted_schemas = {}
  @loaded_schemas.keys.sort.each do |schema_name|
    sorted_schemas[schema_name] = @loaded_schemas[schema_name]
  end
  @loaded_schemas = sorted_schemas
  # return the new schema
  new_schema
end

#has_loaded_schema?(schema_name) ⇒ Boolean

returns true if this table has a loaded schema with the provided name, otherwise false

Returns:

  • (Boolean)

Raises:



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# File 'lib/dynamic_migrations/postgres/server/database/loaded_schemas.rb', line 49

def has_loaded_schema? schema_name
  raise ExpectedSymbolError, schema_name unless schema_name.is_a? Symbol
  @loaded_schemas.key? schema_name
end

#loaded_schema(schema_name) ⇒ Object

returns the loaded schema object for the provided schema name, and raises an error if the schema does not exist



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# File 'lib/dynamic_migrations/postgres/server/database/loaded_schemas.rb', line 38

def loaded_schema schema_name
  unless schema_name.is_a? Symbol
    raise ExpectedSymbolError, schema_name
  end
  unless has_loaded_schema? schema_name
    raise LoadedSchemaDoesNotExistError, "Loaded schema `#{schema_name}` does not exist"
  end
  @loaded_schemas[schema_name]
end

#loaded_schemas ⇒ Object

returns an array of this tables loaded schemas



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# File 'lib/dynamic_migrations/postgres/server/database/loaded_schemas.rb', line 55

def loaded_schemas
  @loaded_schemas.values
end

#loaded_schemas_hash ⇒ Object

returns a hash of this tables loaded schemas, keyed by schema name



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# File 'lib/dynamic_migrations/postgres/server/database/loaded_schemas.rb', line 60

def loaded_schemas_hash
  @loaded_schemas
end