Python models.values方法代码示例

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import values [as 别名]
def __init__(self, real_apps, models, ignore_swappable=False):
        # Any apps in self.real_apps should have all their models included
        # in the render. We don't use the original model instances as there
        # are some variables that refer to the Apps object.
        # FKs/M2Ms from real apps are also not included as they just
        # mess things up with partial states (due to lack of dependencies)
        self.real_models = []
        for app_label in real_apps:
            app = global_apps.get_app_config(app_label)
            for model in app.get_models():
                self.real_models.append(ModelState.from_model(model, exclude_rels=True))
        # Populate the app registry with a stub for each application.
        app_labels = {model_state.app_label for model_state in models.values()}
        app_configs = [AppConfigStub(label) for label in sorted(real_apps + list(app_labels))]
        super(StateApps, self).__init__(app_configs)

        self.render_multiple(list(models.values()) + self.real_models)

        # There shouldn't be any operations pending at this point.
        pending_models = set(self._pending_operations)
        if ignore_swappable:
            pending_models -= {make_model_tuple(settings.AUTH_USER_MODEL)}
        if pending_models:
            raise ValueError(self._pending_models_error(pending_models)) 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import values [as 别名]
def __init__(self, real_apps, models, ignore_swappable=False):
        # Any apps in self.real_apps should have all their models included
        # in the render. We don't use the original model instances as there
        # are some variables that refer to the Apps object.
        # FKs/M2Ms from real apps are also not included as they just
        # mess things up with partial states (due to lack of dependencies)
        self.real_models = []
        for app_label in real_apps:
            app = global_apps.get_app_config(app_label)
            for model in app.get_models():
                self.real_models.append(ModelState.from_model(model, exclude_rels=True))
        # Populate the app registry with a stub for each application.
        app_labels = {model_state.app_label for model_state in models.values()}
        app_configs = [AppConfigStub(label) for label in sorted(real_apps + list(app_labels))]
        super(StateApps, self).__init__(app_configs)

        self.render_multiple(list(models.values()) + self.real_models)

        # If there are some lookups left, see if we can first resolve them
        # ourselves - sometimes fields are added after class_prepared is sent
        for lookup_model, operations in self._pending_lookups.items():
            try:
                model = self.get_model(lookup_model[0], lookup_model[1])
            except LookupError:
                app_label = "%s.%s" % (lookup_model[0], lookup_model[1])
                if app_label == settings.AUTH_USER_MODEL and ignore_swappable:
                    continue
                # Raise an error with a best-effort helpful message
                # (only for the first issue). Error message should look like:
                # "ValueError: Lookup failed for model referenced by
                # field migrations.Book.author: migrations.Author"
                msg = "Lookup failed for model referenced by field {field}: {model[0]}.{model[1]}"
                raise ValueError(msg.format(field=operations[0][1], model=lookup_model))
            else:
                do_pending_lookups(model) 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import values [as 别名]
def __init__(self, real_apps, models, ignore_swappable=False):
        # Any apps in self.real_apps should have all their models included
        # in the render. We don't use the original model instances as there
        # are some variables that refer to the Apps object.
        # FKs/M2Ms from real apps are also not included as they just
        # mess things up with partial states (due to lack of dependencies)
        self.real_models = []
        for app_label in real_apps:
            app = global_apps.get_app_config(app_label)
            for model in app.get_models():
                self.real_models.append(ModelState.from_model(model, exclude_rels=True))
        # Populate the app registry with a stub for each application.
        app_labels = {model_state.app_label for model_state in models.values()}
        app_configs = [AppConfigStub(label) for label in sorted(real_apps + list(app_labels))]
        super().__init__(app_configs)

        # The lock gets in the way of copying as implemented in clone(), which
        # is called whenever Django duplicates a StateApps before updating it.
        self._lock = None

        self.render_multiple(list(models.values()) + self.real_models)

        # There shouldn't be any operations pending at this point.
        from django.core.checks.model_checks import _check_lazy_references
        ignore = {make_model_tuple(settings.AUTH_USER_MODEL)} if ignore_swappable else set()
        errors = _check_lazy_references(self, ignore=ignore)
        if errors:
            raise ValueError("\n".join(error.msg for error in errors)) 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import values [as 别名]
def clone(self):
        """Return a clone of this registry."""
        clone = StateApps([], {})
        clone.all_models = copy.deepcopy(self.all_models)
        clone.app_configs = copy.deepcopy(self.app_configs)
        # Set the pointer to the correct app registry.
        for app_config in clone.app_configs.values():
            app_config.apps = clone
        # No need to actually clone them, they'll never change
        clone.real_models = self.real_models
        return clone 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import values [as 别名]
def __init__(self, real_apps, models, ignore_swappable=False):
        # Any apps in self.real_apps should have all their models included
        # in the render. We don't use the original model instances as there
        # are some variables that refer to the Apps object.
        # FKs/M2Ms from real apps are also not included as they just
        # mess things up with partial states (due to lack of dependencies)
        self.real_models = []
        for app_label in real_apps:
            app = global_apps.get_app_config(app_label)
            for model in app.get_models():
                self.real_models.append(ModelState.from_model(model, exclude_rels=True))
        # Populate the app registry with a stub for each application.
        app_labels = {model_state.app_label for model_state in models.values()}
        app_configs = [AppConfigStub(label) for label in sorted(real_apps + list(app_labels))]
        super(StateApps, self).__init__(app_configs)

        # The lock gets in the way of copying as implemented in clone(), which
        # is called whenever Django duplicates a StateApps before updating it.
        self._lock = None

        self.render_multiple(list(models.values()) + self.real_models)

        # There shouldn't be any operations pending at this point.
        from django.core.checks.model_checks import _check_lazy_references
        ignore = {make_model_tuple(settings.AUTH_USER_MODEL)} if ignore_swappable else set()
        errors = _check_lazy_references(self, ignore=ignore)
        if errors:
            raise ValueError("\n".join(error.msg for error in errors)) 

# 需要导入模块: from django.db import models [as 别名]
# 或者: from django.db.models import values [as 别名]
def clone(self):
        """
        Return a clone of this registry, mainly used by the migration framework.
        """
        clone = StateApps([], {})
        clone.all_models = copy.deepcopy(self.all_models)
        clone.app_configs = copy.deepcopy(self.app_configs)
        # Set the pointer to the correct app registry.
        for app_config in clone.app_configs.values():
            app_config.apps = clone
        # No need to actually clone them, they'll never change
        clone.real_models = self.real_models
        return clone