允许我以说我是新来的人作为我的开头,我看过其他帖子,但仍然无法解决此问题。
我的问题如下,我正在尝试创建一个表格,该表格允许用户输入自己锻炼的一部分,每次练习的次数,设置和所用的体重。但是,如果用户尝试输入任何内容,则其作用类似于只读字段。我怀疑我设置初始值的方式有问题。在我的WorkoutStore.ts中,我定义了一个名为ExercisesForForm的计算值,如下所示:
class MyInt(int):
def __new__(cls, *args, **kwargs):
value = super().__new__(cls, *args, **kwargs)
argstr = ', '.join([str(arg) for arg in args]) # Only for prototype test
print('MyInt({}); Returned {}'.format(argstr, value)) # Only for prototype test
if value < 0 or value > 100:
raise ValueError(' ERROR!! Out of range! Must be 0-100, was {}'.format(value))
return value
if __name__ == '__main__':
myint = MyInt('1111', 2) # Test conversion from binary string, base 2
print('myint = {} (type: {})\n'.format(myint, type(myint)))
for index, arg in enumerate([-99, -0.01, 0, 0.01, 0.5, 0.99, 1.5, 100, 100.1, '101']):
try:
a = MyInt(arg)
except ValueError as ex:
print(ex)
a = None
finally:
print(' a : {} = {}'.format(type(a), a))
当我控制台日志时,我可以清楚地看到它已正确设置。但是,如果我尝试访问它或其他任何内容,都会不断抱怨它未定义。因此,主要的问题实际上是:定义从API端点接收的初始值的正确方法是什么?如果这只是一种专门针对一个实体的形式(例如,像一个练习一样),那么会容易得多,因为那样的话,它将简单地将数据1:1映射到表单中的元素
我正在尝试如下定义表单:
@computed get exercisesForForm() {
const data = this.exercises.map((e) => ({
name: e.name,
id: e.id,
sets: e.sets,
reps: e.reps,
weight: e.weight
}));
return data;
}
对此的后续问题是,如何正确定义表单的名称部分?在MVC.NET(这是我最熟悉的Web明智方法)中,我只需定义一个数组并使用const rootStore = useContext(RootStoreContext);
const {getExercises, exercises, exercisesForForm} = rootStore.workoutStore;
useEffect(() => {
if(match.params.workoutId) {
getExercises(match.params.workoutId);
}
}, [getExercises, match.params.workoutId])
<Formik key={uuid()} onSubmit={handleFormSubmit} initialValues={exercisesForForm} enableReinitialize={true}>
{({
handleSubmit,
handleChange,
values
}) => (
<Form onSubmit={handleSubmit}>
{exercises.map((exercise, index) =>
(
<Fragment key={exercise.id}>
<Header>{exercise.name}</Header>
<Form.Row>
<Form.Group as={Col}>
<Form.Label>Sets</Form.Label>
<Form.Control key={uuid()} type="number" name='sets' value={0} onChange={handleChange}/>
</Form.Group>
</Form.Row>
<Form.Row>
<Form.Group as={Col}>
<Form.Label>Reps</Form.Label>
<Form.Control key={uuid()} type="number" name='reps' onChange={handleChange}/>
</Form.Group>
</Form.Row>
<Form.Row>
<Form.Group as={Col}>
<Form.Label>Weight</Form.Label>
<Form.Control key={uuid()} type="number" name='weight' onChange={handleChange}/>
</Form.Group>
</Form.Row>
</Fragment>
)
)}
<Form.Row>
<Form.Group as={Col} controlId='04'>
<Button content="Submit" floated='right' type="submit"/>
</Form.Group>
</Form.Row>
</Form>
)}</Formik>
答案 0 :(得分:0)
经过大量的搜索,实验和重新阅读文档之后,我得以弄清楚。我将代码更改如下:
<Formik key={uuid()} onSubmit={handleFormSubmit} enableReinitialize={true} initialValues={exercisesForForm}
render={({values, handleChange, handleSubmit}) => (
<Form onSubmit={handleSubmit}>
{values.map((e, index) => (
<Fragment key={index}>
<Header>{e.name}</Header>
<Form.Row>
<Form.Group as={Col}>
<Form.Label>Sets</Form.Label>
<Form.Control key={`${index}_sets`} type='number' name={`[${index}].sets`} value={(e.sets)} onChange={handleChange} />
</Form.Group>
</Form.Row>
<Form.Row>
<Form.Group as={Col}>
<Form.Label>Reps</Form.Label>
<Form.Control key={`${index}_reps`} type='number' name={`[${index}].reps`} value={(e.reps)} onChange={handleChange} />
</Form.Group>
</Form.Row>
<Form.Row>
<Form.Group as={Col}>
<Form.Label>Weight</Form.Label>
<Form.Control key={`${index}_weight`} type='number' name={`[${index}].weight`} value={(e.weight)} onChange={handleChange} />
</Form.Group>
</Form.Row>
</Fragment>
)
)}
)}
<Form.Row>
<Form.Group as={Col} controlId='04'>
<Button content="Submit" floated='right' type="submit"/>
</Form.Group>
</Form.Row>
</Form>
)}
/>
需要注意的事情:我正在使用values
属性来访问初始值;我也使用索引来设置字段的名称。我认为那是将其联系在一起的缺失环节。