class Clear::Reflection::Column

Overview

Reflection of the columns using information_schema in postgreSQL.

TODO Usage of view instead of model

Included Modules

Extended Modules

Defined in:

clear/model/reflection/column.cr

Constant Summary

COLUMNS = {"table_catalog" => {type: String, primary: false, converter: "String", db_column_name: "table_catalog", crystal_variable_name: table_catalog, presence: true, mass_assign: true}, "table_schema" => {type: String, primary: false, converter: "String", db_column_name: "table_schema", crystal_variable_name: table_schema, presence: true, mass_assign: true}, "table_name" => {type: ::Union(String, ::Nil), primary: false, converter: "String", db_column_name: "table_name", crystal_variable_name: table_name, presence: true, mass_assign: true}, "column_name" => {type: String, primary: true, converter: "String", db_column_name: "column_name", crystal_variable_name: column_name, presence: true, mass_assign: true}} of Nil => Nil
POLYMORPHISM_SETTINGS = {} of Nil => Nil

Constructors

Class Method Summary

Instance Method Summary

Instance methods inherited from module Clear::Model

__pkey__ __pkey__, cache : Clear::Model::QueryCache | Nil cache

Class methods inherited from module Clear::Model::FullTextSearchable

to_tsq(text) to_tsq

Instance methods inherited from module Clear::Model::HasValidation

add_error(column, reason)
add_error(reason) add_error, clear_errors clear_errors, error? error?, errors : Array(Error) errors, print_errors print_errors, valid! valid!, valid? valid?, validate validate

Instance methods inherited from module Clear::Model::HasSaving

delete delete, persisted? : Bool persisted?, reload : self reload, save(on_conflict : Clear::SQL::InsertQuery -> | Nil = nil)
save(&block) save, save!(on_conflict : Clear::SQL::InsertQuery -> | Nil = nil)
save!(&block : Clear::SQL::InsertQuery -> ) save!, update(**args) update, update!(**args) update!

Instance methods inherited from module Clear::Model::HasColumns

[](x) : Clear::SQL::Any [], []?(x) : Clear::SQL::Any []?, reset(h : Hash(String, _))
reset(h : Hash(Symbol, _))
reset(**t : **T) forall T reset, set(h : Hash(String, _))
set(h : Hash(Symbol, _))
set(**t : **T) forall T set, to_h(full = false) to_h, update_h update_h

Instance methods inherited from module Clear::Model::HasHooks

trigger_after_events(event_name) trigger_after_events, trigger_before_events(event_name) trigger_before_events, with_triggers(event_name, &) with_triggers

Instance methods inherited from module Clear::ErrorMessages

build_error_message(message : String, ways_to_resolve : Tuple | Array = Tuple.new, manual_pages : Tuple | Array = Tuple.new) build_error_message, converter_error(from, to) converter_error, format_width(x, w = 80) format_width, illegal_setter_access_to_undefined_column(name) illegal_setter_access_to_undefined_column, lack_of_primary_key(model_name) lack_of_primary_key, migration_already_down(number) migration_already_down, migration_already_up(number) migration_already_up, migration_irreversible(name = nil, operation = nil) migration_irreversible, migration_not_found(number) migration_not_found, migration_not_unique(numbers) migration_not_unique, no_migration_yet(version) no_migration_yet, null_column_mapping_error(name, type) null_column_mapping_error, order_by_error_invalid_order(current_order) order_by_error_invalid_order, polymorphic_nil(through) polymorphic_nil, polymorphic_unknown_class(class_name) polymorphic_unknown_class, query_building_error(message) query_building_error, uid_not_found(class_name) uid_not_found, uninitialized_db_connection(connection) uninitialized_db_connection

Constructor Detail

def self.build(x : NamedTuple) : self #

Build a new empty model and fill the columns using the NamedTuple in argument.

Returns the new model


[View source]
def self.build(x : NamedTuple, &block : self -> Nil) : self #

Build a new empty model and fill the columns using the NamedTuple in argument.

Returns the new model


[View source]
def self.create(x : NamedTuple, &block : self -> Nil) : self #

Build and new model and save it. Returns the model.

The model may not be saved due to validation failure; check the returned model errors? and persisted? flags.


[View source]
def self.create(**tuple, &block : self -> Nil) : self #

Build and new model and save it. Returns the model.

The model may not be saved due to validation failure; check the returned model errors? and persisted? flags.


[View source]
def self.create(x : NamedTuple) : self #

Build and new model and save it. Returns the model.

The model may not be saved due to validation failure; check the returned model errors? and persisted? flags.


[View source]
def self.create(**tuple) : self #

Build and new model and save it. Returns the model.

The model may not be saved due to validation failure; check the returned model errors? and persisted? flags.


[View source]
def self.create!(x : NamedTuple, &block : self -> Nil) : self #

Build and new model and save it. Returns the model.

Returns the newly inserted model Raises an exception if validation failed during the saving process.


[View source]
def self.create!(**tuple, &block : self -> Nil) : self #

Build and new model and save it. Returns the model.

Returns the newly inserted model Raises an exception if validation failed during the saving process.


[View source]
def self.create!(x : NamedTuple) : self #

Build and new model and save it. Returns the model.

Returns the newly inserted model Raises an exception if validation failed during the saving process.


[View source]
def self.create!(**tuple) : self #

Build and new model and save it. Returns the model.

Returns the newly inserted model Raises an exception if validation failed during the saving process.


[View source]
def self.new(h : Hash(String, _), cache : Clear::Model::QueryCache | Nil = nil, persisted = false, fetch_columns = false) #

[View source]
def self.new(json : JSON::Any, cache : Clear::Model::QueryCache | Nil = nil, persisted = false) #

[View source]
def self.new(t : NamedTuple, persisted = false) #

[View source]
def self.new #

[View source]

Class Method Detail

def self.build(**tuple : **T) forall T #

Build a new empty model and fill the columns using the NamedTuple in argument.

Returns the new model


[View source]
def self.build(**tuple) #

Build a new empty model and fill the columns using the NamedTuple in argument.

Returns the new model


[View source]
def self.build(**tuple, &) #

Build a new empty model and fill the columns using the NamedTuple in argument.

Returns the new model


[View source]
def self.columns #

[View source]
def self.connection : String #

Define on which connection the model is living. Useful in case of models living in different databases.

Is set to "default" by default.

See Clear::SQL#init(URI, *opts) for more information about multi-connections.

Example:

Clear::SQL.init("postgres://postgres@localhost/database_1")
Clear::SQL.init("secondary", "postgres://postgres@localhost/database_2")

class ModelA
  include Clear::Model

  # Performs all the queries on `database_1`
  # self.connection = "default"
  column id : Int32, primary: true, presence: false
  column title : String
end

class ModelB
  include Clear::Model

  # Performs all the queries on `database_2`
  self.connection = "secondary"

  column id : Int32, primary: true, presence: false
end

def self.connection=(connection : String) #

Define on which connection the model is living. Useful in case of models living in different databases.

Is set to "default" by default.

See Clear::SQL#init(URI, *opts) for more information about multi-connections.

Example:

Clear::SQL.init("postgres://postgres@localhost/database_1")
Clear::SQL.init("secondary", "postgres://postgres@localhost/database_2")

class ModelA
  include Clear::Model

  # Performs all the queries on `database_1`
  # self.connection = "default"
  column id : Int32, primary: true, presence: false
  column title : String
end

class ModelB
  include Clear::Model

  # Performs all the queries on `database_2`
  self.connection = "secondary"

  column id : Int32, primary: true, presence: false
end

def self.create_from_json(string_or_io : String | IO, trusted : Bool = false) #

Create a new model from json and save it. Returns the model.

The model may not be saved due to validation failure; check the returned model errors? and persisted? flags. Trusted flag set to true will allow mass assignment without protection, FALSE by default


def self.create_from_json!(string_or_io : String | IO, trusted : Bool = false) #

Create a new model from json and save it. Returns the model.

Returns the newly inserted model Raises an exception if validation failed during the saving process. Trusted flag set to true will allow mass assignment without protection, FALSE by default


def self.find(x) #

Returns a model using primary key equality Returns nil if not found.


[View source]
def self.find!(x) #

Returns a model using primary key equality. Raises error if the model is not found.


[View source]
def self.from_json(string_or_io : String | IO, trusted : Bool = false) #

Create a new empty model and fill the columns from json. Returns the new model

Trusted flag set to true will allow mass assignment without protection, FALSE by default


def self.full_table_name #

returns the fully qualified and escaped name for this table. add schema if schema is different from 'public' (default schema)

ex: "schema"."table"


[View source]
def self.import(array : Enumerable(self), on_conflict : Clear::SQL::InsertQuery -> | Nil = nil) #

Import a bulk of models in one SQL insert query. Each model must be non-persisted.

on_conflict callback can be optionnaly turned on to manage constraints of the database.

Note: Old models are not modified. This method return a copy of the models as saved in the database.

Example:

users = [User.new(id: 1), User.new(id: 2), User.new(id: 3)]
users = User.import(users)

[View source]
def self.polymorphic? : Bool #

def self.query #

Return a new empty query SELECT * FROM [my_model_table]. Can be refined after that.


[View source]
def self.read_only=(read_only : Bool) #

def self.read_only? : Bool #

def self.schema : Clear::SQL::Symbolic | Nil #

Define the current schema used in PostgreSQL. The value is nil by default, which lead to non-specified schema during the querying, and usage of "public" by PostgreSQL.

This property can be redefined on initialization. Example:

class MyModel
  include Clear::Model

  self.schema = "my_schema"
end
MyModel.query.to_sql # SELECT * FROM "my_schema"."my_models"

def self.schema=(schema : Clear::SQL::Symbolic | Nil) #

Define the current schema used in PostgreSQL. The value is nil by default, which lead to non-specified schema during the querying, and usage of "public" by PostgreSQL.

This property can be redefined on initialization. Example:

class MyModel
  include Clear::Model

  self.schema = "my_schema"
end
MyModel.query.to_sql # SELECT * FROM "my_schema"."my_models"

def self.table : Clear::SQL::Symbolic #

Return the table name setup for this model. By convention, the class name is by default equals to the pluralized underscored string form of the model name. Example:

MyModel => "my_models"
Person => "people"
Project::Info => "project_infos"

The property can be updated at initialization to a custom table name:

class MyModel
  include Clear::Model

  self.table = "another_table_name"
end
MyModel.query.to_sql # SELECT * FROM "another_table_name"

def self.table=(table : Clear::SQL::Symbolic) #

Return the table name setup for this model. By convention, the class name is by default equals to the pluralized underscored string form of the model name. Example:

MyModel => "my_models"
Person => "people"
Project::Info => "project_infos"

The property can be updated at initialization to a custom table name:

class MyModel
  include Clear::Model

  self.table = "another_table_name"
end
MyModel.query.to_sql # SELECT * FROM "another_table_name"

Instance Method Detail

def _cached_table : Clear::Reflection::Table | Nil #

def attributes : Hash(String, Clear::SQL::Any) #

Attributes, used when fetch_columns is true


def cache : Clear::Model::QueryCache | Nil #

def changed? #

Return true if the model is dirty (e.g. one or more fields have been changed.). Return false otherwise.


def clear_change_flags #

Reset the #changed? flag on all columns

The model behave like its not dirty anymore and call to save would apply no changes.

Returns self


def column_name : String #

Returns the value of #column_name column or throw an exception if the column is not defined.


def column_name=(x : String) #

Setter for #column_name column.


def column_name_column : Clear::Model::Column(String, Clear::Model::Converter::StringConverter) #

Returns the column object used to manage #column_name field

See Clear::Model::Column


def reset(h : Hash(Symbol, _)) #

Set the columns from hash


def reset(h : Hash(String, _)) #

Set the model fields from hash


def reset(t : NamedTuple) #

def reset(from_json : JSON::Any) #

def reset(**t : **T) forall T #

reset flavors


def set(h : Hash(Symbol, _)) #

Set the columns from hash


def set(h : Hash(String, _)) #

Set the model fields from hash


def set(t : NamedTuple) #

def set(from_json : JSON::Any) #

def set(**t : **T) forall T #
Description copied from module Clear::Model::HasColumns

Set one or multiple columns to a specific value This two are equivalents:

model.set(a: 1)
model.a = 1

def set_from_json(string_or_io : String | IO, trusted : Bool = false) #

Set the fields from json passed as argument Trusted flag set to true will allow mass assignment without protection, FALSE by default


def table : Clear::Reflection::Table | Nil #

The method table is a belongs_to relation to Clear::Reflection::Table


def table! : Clear::Reflection::Table #

def table=(model : Clear::Reflection::Table | Nil) #

def table_catalog : String #

Returns the value of #table_catalog column or throw an exception if the column is not defined.


def table_catalog=(x : String) #

Setter for #table_catalog column.


def table_catalog_column : Clear::Model::Column(String, Clear::Model::Converter::StringConverter) #

Returns the column object used to manage #table_catalog field

See Clear::Model::Column


def table_name : Union(String, Nil) #

Returns the value of #table_name column or throw an exception if the column is not defined.


def table_name=(x : Union(String, Nil)) #

Setter for #table_name column.


def table_name_column : Clear::Model::Column(Union(String, Nil), Clear::Model::Converter::StringConverter) #

Returns the column object used to manage #table_name field

See Clear::Model::Column


def table_schema : String #

Returns the value of #table_schema column or throw an exception if the column is not defined.


def table_schema=(x : String) #

Setter for #table_schema column.


def table_schema_column : Clear::Model::Column(String, Clear::Model::Converter::StringConverter) #

Returns the column object used to manage #table_schema field

See Clear::Model::Column


def to_h(full = false) : Hash(String, Clear::SQL::Any) #

Return a hash version of the columns of this model.


def to_json(emit_nulls : Bool = false) #

def to_json(json, emit_nulls = false) #

def update_from_json(string_or_io : String | IO, trusted : Bool = false) #

Set the fields from json passed as argument and call save on the object Trusted flag set to true will allow mass assignment without protection, FALSE by default


def update_from_json!(string_or_io : String | IO, trusted : Bool = false) #

Set the fields from json passed as argument and call save! on the object Trusted flag set to true will allow mass assignment without protection, FALSE by default


def update_h : Hash(String, Clear::SQL::Any) #

Generate the hash for update request (like during save)


def validate_fields_presence #

For each column, ensure than when needed the column has present information into it.

This method is called on validation.