4

我正在使用 Django Viewflow，就像没有 gui 的流引擎一样。任何人都可以发布一个以编程方式创建流程和流程管理的示例吗？我不明白如何在没有前端的情况下完全从 django 代码（例如来自测试类）管理流程。我需要先创建一个流实例吗？我如何知道我必须执行哪项任务以及如何执行它？我只需要使用没有 gui 的视图流

提前致谢！

我的应用程序/models.py

class MedicalParameters(models.Model):
    # medical parameters
    pas = models.IntegerField(verbose_name="Pressione Sistolica")
    pad = models.IntegerField(verbose_name="Pressione Diastolica")
    fc = models.IntegerField(verbose_name="Frequenza Cardiaca")

class Triage(models.Model):
    date = models.DateTimeField(auto_now=True)
    patient_id = models.CharField(max_length=20)
    first_name = models.CharField(max_length=150)
    last_name = models.CharField(max_length=150)
    birth_date = models.DateField(auto_now=False)
    sex = models.CharField(max_length=1, choices=SEX, default='M')

    # Medical Parameters
    parameters = models.ForeignKey(MedicalParameters, blank=True, null=True,
                                   on_delete=models.PROTECT)



class TriageProcess(Process):
    triage = models.ForeignKey(Triage, blank=True, null=True, on_delete=models.CASCADE)

    class Meta:
        verbose_name_plural = 'Triage process'

我的应用程序/flow.py

class TriageFlow(Flow):
    process_class = TriageProcess

    process_title = 'Processo di Triage'
    process_description = 'Processo di Triage'

    summary_template = """
            Triage di {{ process.triage.first_name }} {{ process.triage.last_name }}
            """

    start = (
        flow.Start(
            views.StartView,
            task_title="Nuovo Triage",
            task_description="Inizia Triege"
        ).Permission(
            auto_create=True
        ).Next(this.register_measures)
    )

    register_measures = (
        flow.View(
            views.MeasuresView,
            # fields=["parameters"],
            task_description="Acquisisci Misure",
            task_title='Misure da Multiparametrico'
        )
            .Assign(lambda act: act.process.created_by)
            .Next(this.choose_capitolo)
    )

我的应用程序/view.py

class StartView(StartFlowMixin, generic.UpdateView):
    form_class = TriageForm

    layout = Layout(
        Row('patient_id'),
        Fieldset('Patient Details',
                 Row('first_name', 'last_name', 'birth_date'),
                 Row('sex',
                     # 'age'
                     )
                 )
    )

    def get_object(self):
        return self.activation.process.triage

    def activation_done(self, form):
        triage = form.save()
        self.activation.process.triage = triage
        self.activation.process.triage.color = COLOR_VALUE.BIANCO
        super(StartView, self).activation_done(form)

        # super(StartView, self).activation_done(form)



class MeasuresView(FlowMixin, generic.UpdateView):
    form_class = MedicalParametersForm
    layout = Layout(
        Fieldset('Temperatura ( C )',
                 Row('temp')),
        Fieldset('Pressione',
                 Row('pas'),
                 Row('pad')),
        Fieldset('Frequenza',
                 Row('fc'),
                 Row('fr'),
                 Row('fio2')),
        Fieldset("Analisi Cliniche",
                 Row('so2'),
                 Row('ph')),
        Fieldset('Emogas',
                 Row('pao2'),
                 Row('paco2'),
                 Row('hco3')),
        Fieldset("Indici",
                 Row('gcs')
                 # Row('shock')
                 ))

    def get_object(self):
        return self.activation.process.triage.parameters

    def activation_done(self, form):
        _measures = form.save()
        self.activation.process.triage.parameters = _measures
        if not self.activation.process.triage.parameters.fc is None \
                and not self.activation.process.triage.parameters.pas is None:
            self.activation.process.triage.parameters.shock = self.activation.process.triage.parameters.fc / self.activation.process.triage.parameters.pas
            self.activation.process.triage.parameters.save()
        color = _measures.calculate_color()
        self.activation.process.triage.color = color
        self.activation.process.triage.rivalutazione = None

        self.activation.process.triage.save()
        super(MeasuresView, self).activation_done(form)
4

3 回答 3

2

作为流程一部分的测试视图限制了您在测试中可以做的事情。例如，在特定视图的同一流程中添加模板和模板变量的测试变得很麻烦。

如果您要进行彻底的测试。你的测试会在规模上爆炸到一个不受欢迎的水平。

绕过每个视图都需要完成前一个任务的事实。您可以使用 factory boy 创建与视图关联的特定流程任务。并使用 post generation hook 运行必要的激活，这意味着您可以像在测试中调用其他普通 django 视图一样调用视图。

流.py

from viewflow import flow
from viewflow.base import Flow, this

from .views import SampleCreateView, SampleUpdateViewOne, SampleUpdateViewTwo

class SampleFlow(Flow):

    start = flow.Start(SampleCreateView).Next(this.update_one)

    update_one = flow.View(SampleUpdateViewOne).Next(this.update_two)

    update_two = flow.View(SampleUpdateViewTwo).Next(this.end)

    end = flow.End()

测试/工厂.py

class TaskFactory(factory.django.DjangoModelFactory):

    class Meta:
        model = Task

    process = factory.SubFactory(SampleProcessFactory)
    flow_task = SampleFlow.start
    owner = factory.SubFactory(UserFactory)
    token = 'START'

    @factory.post_generation
    def run_activations(self, create, extracted, **kwargs):
        activation = self.activate()
        if hasattr(activation, 'assign'):
            activation.assign()

测试/test_views.py

class TestSampleFlowUpdateViewTwo(TestCase):

    def setUp(self):
        self.process = SampleProcessFactory()
        self.task_owner = UserFactory()
        self.task = TaskFactory(process=self.process, 
            flow_task=SampleFlow.update_two, owner=self.task_owner)
        self.url = reverse('unittest_viewflow:sampleflow:update_two',
                       kwargs={'process_pk': self.process.pk, 'task_pk': self.task.pk})

    def test_get(self):
        self.client.force_login(self.task_owner)
        response = self.client.get(self.url)
        self.assertTrue(response.status_code, 200)

    def test_post(self):
        self.client.force_login(self.task_owner)
        data = {'_viewflow_activation-started': '1970-01-01', 'update_two': 'Update Two'}
        response = self.client.post(self.url, data=data)
        self.assertEqual(Task.objects.get(pk=self.task.pk).status, 'DONE')

有关更多信息，您可以查看此repo

于 2020-03-10T07:29:41.937 回答
1

要测试TestClass中的流程，您可以像往常一样使用 django TestClient。只需重复在浏览器中手动执行的相同步骤即可。

您可以查看 HelloWorld 演示测试的示例 - https://github.com/viewflow/cookbook/blob/master/helloworld/demo/tests.py

class Test(TestCase):
    def setUp(self):
        User.objects.create_superuser('admin', 'admin@example.com', 'password')
        self.client.login(username='admin', password='password')

    def testApproved(self):
        self.client.post(
            '/workflow/helloworld/helloworld/start/',
            {'text': 'Hello, world',
             '_viewflow_activation-started': '2000-01-01'}
        )

        self.client.post(
            '/workflow/helloworld/helloworld/1/approve/2/assign/'
        )

        self.client.post(
            '/workflow/helloworld/helloworld/1/approve/2/',
            {'approved': True,
             '_viewflow_activation-started': '2000-01-01'}
        )

        process = Process.objects.get()

        self.assertEquals('DONE', process.status)
        self.assertEquals(5, process.task_set.count())
于 2017-06-22T08:14:58.523 回答
1

请参阅此答案，该答案显示了如何在正常的“手动”起点旁边向流程添加编程起点：

class MyRunFlow(flow.Flow):
    process_class = Run

    start = flow.Start(ProcessCreate, fields=['schedule']). \
        Permission(auto_create=True). \
        Next(this.wait_data_collect_start)
    start2 = flow.StartFunction(process_create). \
        Next(this.wait_data_collect_start)

请注意，重要的一点是process_create具有Process对象，并且此代码必须以编程方式设置手动表单提交通过字段规范执行的相同字段ProcessCreate：

@flow_start_func
def process_create(activation: FuncActivation, **kwargs):
    #
    # Update the database record.
    #
    db_sch = Schedule.objects.get(id=kwargs['schedule'])
    activation.process.schedule = db_sch # <<<< Same fields as ProcessCreate
    activation.process.save()
    #
    # Go!
    #
    activation.prepare()
    with Context(propagate_exception=False):
        activation.done()
    return activation

需要注意的是，一旦您以编程方式启动流程，序列中的任何非手动任务都会自动执行

在我在这里描述的一系列非手动任务中，有一个关于错误处理的导入警告没有提到，我给出了部分答案（我不知道完整的答案，这就是为什么发布这个问题！）；这就是这with Context()部分的原因。

@kmmbvnr对原始线程的第一个答案还包含有关如何随后以编程方式操作任务的提示。因此，当您的流程进入手动任务时，您可以分配它等等。

于 2018-05-15T07:20:34.630 回答