X-Git-Url: http://git.veekun.com/zzz-pokedex.git/blobdiff_plain/e436aa7bfeb905899777318818ac9c51c1917593..896564aaefb6388ca6557e1a1b6bbe1d8ff3d90d:/pokedex/db/tables.py?ds=sidebyside diff --git a/pokedex/db/tables.py b/pokedex/db/tables.py index 7bf30c4..b0e9c24 100644 --- a/pokedex/db/tables.py +++ b/pokedex/db/tables.py @@ -1,25 +1,37 @@ +# encoding: utf8 + from sqlalchemy import Column, ForeignKey, MetaData, Table from sqlalchemy.ext.declarative import declarative_base -from sqlalchemy.orm import relation +from sqlalchemy.ext.associationproxy import association_proxy +from sqlalchemy.orm import backref, relation +from sqlalchemy.sql import and_ from sqlalchemy.types import * from sqlalchemy.databases.mysql import * +from pokedex.db import rst + metadata = MetaData() TableBase = declarative_base(metadata=metadata) class Ability(TableBase): __tablename__ = 'abilities' + __singlename__ = 'ability' id = Column(Integer, primary_key=True, nullable=False) name = Column(Unicode(24), nullable=False) flavor_text = Column(Unicode(64), nullable=False) effect = Column(Unicode(255), nullable=False) +class ContestCombo(TableBase): + __tablename__ = 'contest_combos' + first_move_id = Column(Integer, ForeignKey('moves.id'), primary_key=True, nullable=False, autoincrement=False) + second_move_id = Column(Integer, ForeignKey('moves.id'), primary_key=True, nullable=False, autoincrement=False) + class ContestEffect(TableBase): __tablename__ = 'contest_effects' id = Column(Integer, primary_key=True, nullable=False) appeal = Column(SmallInteger, nullable=False) jam = Column(SmallInteger, nullable=False) - flavor = Column(Unicode(255), nullable=False) + flavor_text = Column(Unicode(64), nullable=False) effect = Column(Unicode(255), nullable=False) class EggGroup(TableBase): @@ -27,6 +39,95 @@ class EggGroup(TableBase): id = Column(Integer, primary_key=True, nullable=False) name = Column(Unicode(16), nullable=False) +class Encounter(TableBase): + """Rows in this table represent encounters with wild Pokémon. Bear with + me, here. + + Within a given area in a given game, encounters are differentiated by the + "slot" they are in and the state of the game world. + + What the player is doing to get an encounter, such as surfing or walking + through tall grass, is called terrain. Each terrain has its own set of + encounter slots. + + Within a terrain, slots are defined primarily by rarity. Each slot can + also be affected by world conditions; for example, the 20% slot for walking + in tall grass is affected by whether a swarm is in effect in that area. + "Is there a swarm?" is a condition; "there is a swarm" and "there is not a + swarm" are the possible values of this condition. + + A slot (20% walking in grass) and any appropriate world conditions (no + swarm) are thus enough to define a specific encounter. + + Well, okay, almost: each slot actually appears twice. + """ + + __tablename__ = 'encounters' + id = Column(Integer, primary_key=True, nullable=False) + version_id = Column(Integer, ForeignKey('versions.id'), nullable=False, autoincrement=False) + location_area_id = Column(Integer, ForeignKey('location_areas.id'), nullable=False, autoincrement=False) + encounter_slot_id = Column(Integer, ForeignKey('encounter_slots.id'), nullable=False, autoincrement=False) + pokemon_id = Column(Integer, ForeignKey('pokemon.id'), nullable=False, autoincrement=False) + min_level = Column(Integer, nullable=False, autoincrement=False) + max_level = Column(Integer, nullable=False, autoincrement=False) + +class EncounterCondition(TableBase): + """Rows in this table represent varying conditions in the game world, such + as time of day. + """ + + __tablename__ = 'encounter_conditions' + id = Column(Integer, primary_key=True, nullable=False) + name = Column(Unicode(64), nullable=False) + +class EncounterConditionValue(TableBase): + """Rows in this table represent possible states for a condition; for + example, the state of 'swarm' could be 'swarm' or 'no swarm'. + """ + + __tablename__ = 'encounter_condition_values' + id = Column(Integer, primary_key=True, nullable=False) + encounter_condition_id = Column(Integer, ForeignKey('encounter_conditions.id'), primary_key=False, nullable=False, autoincrement=False) + name = Column(Unicode(64), nullable=False) + default = Column(Boolean, nullable=False) + +class EncounterConditionValueMap(TableBase): + """Maps encounters to the specific conditions under which they occur.""" + + __tablename__ = 'encounter_condition_value_map' + encounter_id = Column(Integer, ForeignKey('encounters.id'), primary_key=True, nullable=False, autoincrement=False) + encounter_condition_value_id = Column(Integer, ForeignKey('encounter_condition_values.id'), primary_key=True, nullable=False, autoincrement=False) + +class EncounterTerrain(TableBase): + """Rows in this table represent ways the player can enter a wild encounter, + e.g., surfing, fishing, or walking through tall grass. + """ + + __tablename__ = 'encounter_terrain' + id = Column(Integer, primary_key=True, nullable=False) + name = Column(Unicode(64), nullable=False) + +class EncounterSlot(TableBase): + """Rows in this table represent an abstract "slot" within a terrain, + associated with both some set of conditions and a rarity. + + Note that there are two encounters per slot, so the rarities will only add + up to 50. + """ + + __tablename__ = 'encounter_slots' + id = Column(Integer, primary_key=True, nullable=False) + version_group_id = Column(Integer, ForeignKey('version_groups.id'), nullable=False, autoincrement=False) + encounter_terrain_id = Column(Integer, ForeignKey('encounter_terrain.id'), primary_key=False, nullable=False, autoincrement=False) + rarity = Column(Integer, nullable=False, autoincrement=False) + +class EncounterSlotCondition(TableBase): + """Lists all conditions that affect each slot.""" + + __tablename__ = 'encounter_slot_conditions' + encounter_slot_id = Column(Integer, ForeignKey('encounter_slots.id'), primary_key=True, nullable=False, autoincrement=False) + encounter_condition_id = Column(Integer, ForeignKey('encounter_conditions.id'), primary_key=True, nullable=False, autoincrement=False) + class EvolutionChain(TableBase): __tablename__ = 'evolution_chains' id = Column(Integer, primary_key=True, nullable=False) @@ -47,22 +148,97 @@ class Generation(TableBase): main_region = Column(Unicode(16), nullable=False) class GrowthRate(TableBase): + """`formula` is written in LaTeX math notation.""" __tablename__ = 'growth_rates' id = Column(Integer, primary_key=True, nullable=False) + name = Column(Unicode(20), nullable=False) + formula = Column(Unicode(500), nullable=False) + +class Item(TableBase): + __tablename__ = 'items' + __singlename__ = 'item' + id = Column(Integer, primary_key=True, nullable=False) name = Column(Unicode(16), nullable=False) - formula = Column(Unicode(255), nullable=False) class Language(TableBase): __tablename__ = 'languages' id = Column(Integer, primary_key=True, nullable=False) + iso3166 = Column(Unicode(2), nullable=False) name = Column(Unicode(16), nullable=False) +class Location(TableBase): + __tablename__ = 'locations' + __singlename__ = 'location' + id = Column(Integer, primary_key=True, nullable=False) + generation_id = Column(Integer, ForeignKey('generations.id'), nullable=False) + name = Column(Unicode(64), nullable=False) + +class LocationArea(TableBase): + __tablename__ = 'location_areas' + id = Column(Integer, primary_key=True, nullable=False) + location_id = Column(Integer, ForeignKey('locations.id'), nullable=False) + internal_id = Column(Integer, nullable=False) + name = Column(Unicode(64), nullable=True) + +class LocationAreaEncounterRate(TableBase): + __tablename__ = 'location_area_encounter_rates' + location_area_id = Column(Integer, ForeignKey('location_areas.id'), primary_key=True, nullable=False, autoincrement=False) + encounter_type_id = Column(Integer, ForeignKey('encounter_terrain.id'), primary_key=True, nullable=False, autoincrement=False) + rate = Column(Integer, nullable=True) + +class Machine(TableBase): + __tablename__ = 'machines' + machine_number = Column(Integer, primary_key=True, nullable=False, autoincrement=False) + version_group_id = Column(Integer, ForeignKey('version_groups.id'), primary_key=True, nullable=False, autoincrement=False) + move_id = Column(Integer, ForeignKey('moves.id'), nullable=False) + +class MoveEffectCategory(TableBase): + __tablename__ = 'move_effect_categories' + id = Column(Integer, primary_key=True, nullable=False) + name = Column(Unicode(64), nullable=False) + can_affect_user = Column(Boolean, nullable=False) + +class MoveEffectCategoryMap(TableBase): + __tablename__ = 'move_effect_category_map' + move_effect_id = Column(Integer, ForeignKey('move_effects.id'), primary_key=True, nullable=False) + move_effect_category_id = Column(Integer, ForeignKey('move_effect_categories.id'), primary_key=True, nullable=False) + affects_user = Column(Boolean, primary_key=True, nullable=False) + +class MoveDamageClass(TableBase): + __tablename__ = 'move_damage_classes' + id = Column(Integer, primary_key=True, nullable=False) + name = Column(Unicode(8), nullable=False) + description = Column(Unicode(64), nullable=False) + class MoveEffect(TableBase): __tablename__ = 'move_effects' id = Column(Integer, primary_key=True, nullable=False) priority = Column(SmallInteger, nullable=False) - short_effect = Column(Unicode(128), nullable=False) - effect = Column(Unicode(255), nullable=False) + short_effect = Column(Unicode(256), nullable=False) + effect = Column(Unicode(5120), nullable=False) + +class MoveFlag(TableBase): + __tablename__ = 'move_flags' + move_id = Column(Integer, ForeignKey('moves.id'), primary_key=True, nullable=False, autoincrement=False) + move_flag_type_id = Column(Integer, ForeignKey('move_flag_types.id'), primary_key=True, nullable=False, autoincrement=False) + +class MoveFlagType(TableBase): + __tablename__ = 'move_flag_types' + id = Column(Integer, primary_key=True, nullable=False) + name = Column(Unicode(32), nullable=False) + description = Column(rst.RstTextColumn(128), nullable=False) + +class MoveFlavorText(TableBase): + __tablename__ = 'move_flavor_text' + move_id = Column(Integer, ForeignKey('moves.id'), primary_key=True, nullable=False, autoincrement=False) + generation_id = Column(Integer, ForeignKey('generations.id'), primary_key=True, nullable=False, autoincrement=False) + flavor_text = Column(Unicode(255), nullable=False) + +class MoveName(TableBase): + __tablename__ = 'move_names' + move_id = Column(Integer, ForeignKey('moves.id'), primary_key=True, nullable=False, autoincrement=False) + language_id = Column(Integer, ForeignKey('languages.id'), primary_key=True, nullable=False, autoincrement=False) + name = Column(Unicode(16), nullable=False) class MoveTarget(TableBase): __tablename__ = 'move_targets' @@ -72,28 +248,39 @@ class MoveTarget(TableBase): class Move(TableBase): __tablename__ = 'moves' + __singlename__ = 'move' id = Column(Integer, primary_key=True, nullable=False) name = Column(Unicode(12), nullable=False) + generation_id = Column(Integer, ForeignKey('generations.id'), nullable=False) type_id = Column(Integer, ForeignKey('types.id'), nullable=False) power = Column(SmallInteger) pp = Column(SmallInteger, nullable=False) accuracy = Column(SmallInteger) target_id = Column(Integer, ForeignKey('move_targets.id'), nullable=False) - category = Column(Unicode(8), nullable=False) + damage_class_id = Column(Integer, ForeignKey('move_damage_classes.id'), nullable=False) effect_id = Column(Integer, ForeignKey('move_effects.id'), nullable=False) effect_chance = Column(Integer) contest_type = Column(Unicode(8), nullable=False) - contest_effect_id = Column(Integer, ForeignKey('contest_effects.id'), nullable=False) - super_contest_effect_id = Column(Integer, nullable=False) + contest_effect_id = Column(Integer, ForeignKey('contest_effects.id'), nullable=True) + super_contest_effect_id = Column(Integer, ForeignKey('super_contest_effects.id'), nullable=False) class Pokemon(TableBase): + """The core to this whole mess. + + Note that I use both 'forme' and 'form' in both code and the database. I + only use 'forme' when specifically referring to Pokémon that have multiple + distinct species as forms—i.e., different stats or movesets. 'Form' is a + more general term referring to any variation within a species, including + purely cosmetic forms like Unown. + """ __tablename__ = 'pokemon' + __singlename__ = 'pokemon' id = Column(Integer, primary_key=True, nullable=False) name = Column(Unicode(20), nullable=False) forme_name = Column(Unicode(16)) forme_base_pokemon_id = Column(Integer, ForeignKey('pokemon.id')) generation_id = Column(Integer, ForeignKey('generations.id')) - evolution_chain_id = Column(Integer, ForeignKey('evolution_chains.id'), nullable=False) + evolution_chain_id = Column(Integer, ForeignKey('evolution_chains.id')) evolution_parent_pokemon_id = Column(Integer, ForeignKey('pokemon.id')) evolution_method_id = Column(Integer, ForeignKey('evolution_methods.id')) evolution_parameter = Column(Unicode(32)) @@ -109,8 +296,39 @@ class Pokemon(TableBase): base_happiness = Column(Integer, nullable=False) gen1_internal_id = Column(Integer) is_baby = Column(Boolean, nullable=False) - has_dp_fem_sprite = Column(Boolean, nullable=False) - has_dp_fem_back_sprite = Column(Boolean, nullable=False) + has_gen4_fem_sprite = Column(Boolean, nullable=False) + has_gen4_fem_back_sprite = Column(Boolean, nullable=False) + + ### Stuff to handle alternate Pokémon forms + + @property + def national_id(self): + """Returns the National Pokédex number for this Pokémon. Use this + instead of the id directly; alternate formes may make the id incorrect. + """ + + if self.forme_base_pokemon_id: + return self.forme_base_pokemon_id + return self.id + + @property + def full_name(self): + """Returns the name of this Pokémon, including its Forme, if any.""" + + if self.forme_name: + return "%s %s" % (self.forme_name.capitalize(), self.name) + return self.name + + @property + def normal_form(self): + """Returns the normal form for this Pokémon; i.e., this will return + regular Deoxys when called on any Deoxys form. + """ + + if self.forme_base_pokemon: + return self.forme_base_pokemon + + return self class PokemonAbility(TableBase): __tablename__ = 'pokemon_abilities' @@ -135,6 +353,40 @@ class PokemonFlavorText(TableBase): version_id = Column(Integer, ForeignKey('versions.id'), primary_key=True, nullable=False, autoincrement=False) flavor_text = Column(Unicode(255), nullable=False) +class PokemonFormGroup(TableBase): + __tablename__ = 'pokemon_form_groups' + pokemon_id = Column(Integer, ForeignKey('pokemon.id'), primary_key=True, nullable=False, autoincrement=False) + description = Column(Unicode(512), nullable=False) + +class PokemonFormSprite(TableBase): + __tablename__ = 'pokemon_form_sprites' + id = Column(Integer, primary_key=True, nullable=False) + pokemon_id = Column(Integer, ForeignKey('pokemon.id'), primary_key=True, nullable=False, autoincrement=False) + introduced_in_version_group_id = Column(Integer, ForeignKey('version_groups.id'), primary_key=True, nullable=False, autoincrement=False) + name = Column(Unicode(16), nullable=True) + +class PokemonItem(TableBase): + __tablename__ = 'pokemon_items' + pokemon_id = Column(Integer, ForeignKey('pokemon.id'), primary_key=True, nullable=False, autoincrement=False) + version_id = Column(Integer, ForeignKey('versions.id'), primary_key=True, nullable=False, autoincrement=False) + item_id = Column(Integer, ForeignKey('items.id'), primary_key=True, nullable=False, autoincrement=False) + rarity = Column(Integer, nullable=False) + +class PokemonMove(TableBase): + __tablename__ = 'pokemon_moves' + pokemon_id = Column(Integer, ForeignKey('pokemon.id'), primary_key=True, nullable=False, autoincrement=False) + version_group_id = Column(Integer, ForeignKey('version_groups.id'), primary_key=True, nullable=False, autoincrement=False) + move_id = Column(Integer, ForeignKey('moves.id'), primary_key=True, nullable=False, autoincrement=False, index=True) + pokemon_move_method_id = Column(Integer, ForeignKey('pokemon_move_methods.id'), primary_key=True, nullable=False, autoincrement=False) + level = Column(Integer, primary_key=True, nullable=True, autoincrement=False) + order = Column(Integer, nullable=True) + +class PokemonMoveMethod(TableBase): + __tablename__ = 'pokemon_move_methods' + id = Column(Integer, primary_key=True, nullable=False, autoincrement=False) + name = Column(Unicode(64), nullable=False) + description = Column(Unicode(255), nullable=False) + class PokemonName(TableBase): __tablename__ = 'pokemon_names' pokemon_id = Column(Integer, ForeignKey('pokemon.id'), primary_key=True, nullable=False, autoincrement=False) @@ -165,6 +417,17 @@ class Stat(TableBase): id = Column(Integer, primary_key=True, nullable=False) name = Column(Unicode(16), nullable=False) +class SuperContestCombo(TableBase): + __tablename__ = 'super_contest_combos' + first_move_id = Column(Integer, ForeignKey('moves.id'), primary_key=True, nullable=False, autoincrement=False) + second_move_id = Column(Integer, ForeignKey('moves.id'), primary_key=True, nullable=False, autoincrement=False) + +class SuperContestEffect(TableBase): + __tablename__ = 'super_contest_effects' + id = Column(Integer, primary_key=True, nullable=False) + appeal = Column(SmallInteger, nullable=False) + flavor_text = Column(Unicode(64), nullable=False) + class TypeEfficacy(TableBase): __tablename__ = 'type_efficacy' damage_type_id = Column(Integer, ForeignKey('types.id'), primary_key=True, nullable=False, autoincrement=False) @@ -173,9 +436,12 @@ class TypeEfficacy(TableBase): class Type(TableBase): __tablename__ = 'types' + __singlename__ = 'type' id = Column(Integer, primary_key=True, nullable=False) name = Column(Unicode(8), nullable=False) abbreviation = Column(Unicode(3), nullable=False) + generation_id = Column(Integer, ForeignKey('generations.id'), nullable=False) + damage_class_id = Column(Integer, ForeignKey('move_damage_classes.id'), nullable=False) ## ??? is none; everything else is physical or special class VersionGroup(TableBase): __tablename__ = 'version_groups' @@ -190,17 +456,87 @@ class Version(TableBase): ### Relations down here, to avoid ordering problems +ContestCombo.first = relation(Move, primaryjoin=ContestCombo.first_move_id==Move.id, + backref='contest_combo_first') +ContestCombo.second = relation(Move, primaryjoin=ContestCombo.second_move_id==Move.id, + backref='contest_combo_second') + +Encounter.location_area = relation(LocationArea, backref='encounters') +Encounter.pokemon = relation(Pokemon, backref='encounters') +Encounter.version = relation(Version, backref='encounters') +Encounter.slot = relation(EncounterSlot, backref='encounters') + +EncounterConditionValue.condition = relation(EncounterCondition, backref='values') + +Encounter.condition_value_map = relation(EncounterConditionValueMap, backref='encounter') +Encounter.condition_values = association_proxy('condition_value_map', 'condition_value') +EncounterConditionValueMap.condition_value = relation(EncounterConditionValue, + backref='encounter_map') + +EncounterSlot.terrain = relation(EncounterTerrain, backref='slots') + +EncounterSlot.condition_map = relation(EncounterSlotCondition, backref='slot') +EncounterSlot.conditions = association_proxy('condition_map', 'condition') +EncounterSlotCondition.condition = relation(EncounterCondition, + backref='slot_map') + EvolutionChain.growth_rate = relation(GrowthRate, backref='evolution_chains') + +Generation.versions = relation(Version, secondary=VersionGroup.__table__) + +LocationArea.location = relation(Location, backref='areas') + +Machine.version_group = relation(VersionGroup) + +Move.contest_effect = relation(ContestEffect, backref='moves') +Move.contest_combo_next = association_proxy('contest_combo_first', 'second') +Move.contest_combo_prev = association_proxy('contest_combo_second', 'first') +Move.damage_class = relation(MoveDamageClass, backref='moves') +Move.flags = association_proxy('move_flags', 'flag') +Move.flavor_text = relation(MoveFlavorText, order_by=MoveFlavorText.generation_id, backref='move') +Move.foreign_names = relation(MoveName, backref='pokemon') +Move.generation = relation(Generation, backref='moves') +Move.machines = relation(Machine, backref='move') +Move.move_effect = relation(MoveEffect, backref='moves') +Move.move_flags = relation(MoveFlag, backref='move') +Move.super_contest_effect = relation(SuperContestEffect, backref='moves') +Move.super_contest_combo_next = association_proxy('super_contest_combo_first', 'second') +Move.super_contest_combo_prev = association_proxy('super_contest_combo_second', 'first') +Move.target = relation(MoveTarget, backref='moves') +Move.type = relation(Type, backref='moves') + +Move.effect = rst.MoveEffectProperty('effect') +Move.priority = association_proxy('move_effect', 'priority') +Move.short_effect = rst.MoveEffectProperty('short_effect') + +MoveEffect.category_map = relation(MoveEffectCategoryMap) +MoveEffect.categories = association_proxy('category_map', 'category') +MoveEffectCategoryMap.category = relation(MoveEffectCategory) + +MoveFlag.flag = relation(MoveFlagType) + +MoveFlavorText.generation = relation(Generation) + +MoveName.language = relation(Language) + Pokemon.abilities = relation(Ability, secondary=PokemonAbility.__table__, order_by=PokemonAbility.slot, backref='pokemon') +Pokemon.formes = relation(Pokemon, primaryjoin=Pokemon.id==Pokemon.forme_base_pokemon_id, + backref=backref('forme_base_pokemon', + remote_side=[Pokemon.id])) Pokemon.dex_numbers = relation(PokemonDexNumber, backref='pokemon') Pokemon.egg_groups = relation(EggGroup, secondary=PokemonEggGroup.__table__, order_by=PokemonEggGroup.egg_group_id, backref='pokemon') Pokemon.evolution_chain = relation(EvolutionChain, backref='pokemon') -Pokemon.flavor_text = relation(PokemonFlavorText, backref='pokemon') +Pokemon.evolution_method = relation(EvolutionMethod) +Pokemon.evolution_children = relation(Pokemon, primaryjoin=Pokemon.id==Pokemon.evolution_parent_pokemon_id, + backref=backref('evolution_parent', + remote_side=[Pokemon.id])) +Pokemon.flavor_text = relation(PokemonFlavorText, order_by=PokemonFlavorText.pokemon_id, backref='pokemon') Pokemon.foreign_names = relation(PokemonName, backref='pokemon') +Pokemon.items = relation(PokemonItem) Pokemon.generation = relation(Generation, backref='pokemon') Pokemon.shape = relation(PokemonShape, backref='pokemon') Pokemon.stats = relation(PokemonStat, backref='pokemon') @@ -210,10 +546,33 @@ PokemonDexNumber.generation = relation(Generation) PokemonFlavorText.version = relation(Version) +PokemonItem.item = relation(Item, backref='pokemon') +PokemonItem.version = relation(Version) + +PokemonFormGroup.pokemon = relation(Pokemon, backref=backref('form_group', + uselist=False)) +PokemonFormSprite.pokemon = relation(Pokemon, backref='form_sprites') +PokemonFormSprite.introduced_in = relation(VersionGroup) + +PokemonMove.pokemon = relation(Pokemon, backref='pokemon_moves') +PokemonMove.version_group = relation(VersionGroup) +PokemonMove.machine = relation(Machine, backref='pokemon_moves', + primaryjoin=and_(Machine.version_group_id==PokemonMove.version_group_id, + Machine.move_id==PokemonMove.move_id), + foreign_keys=[Machine.version_group_id, Machine.move_id], + uselist=False) +PokemonMove.move = relation(Move, backref='pokemon_moves') +PokemonMove.method = relation(PokemonMoveMethod) + PokemonName.language = relation(Language) PokemonStat.stat = relation(Stat) +SuperContestCombo.first = relation(Move, primaryjoin=SuperContestCombo.first_move_id==Move.id, + backref='super_contest_combo_first') +SuperContestCombo.second = relation(Move, primaryjoin=SuperContestCombo.second_move_id==Move.id, + backref='super_contest_combo_second') + Type.damage_efficacies = relation(TypeEfficacy, primaryjoin=Type.id ==TypeEfficacy.damage_type_id, @@ -222,3 +581,11 @@ Type.target_efficacies = relation(TypeEfficacy, primaryjoin=Type.id ==TypeEfficacy.target_type_id, backref='target_type') + +Type.generation = relation(Generation, backref='types') +Type.damage_class = relation(MoveDamageClass, backref='types') + +Version.version_group = relation(VersionGroup, backref='versions') +Version.generation = association_proxy('version_group', 'generation') + +VersionGroup.generation = relation(Generation, backref='version_groups')