仅在标记为true时如何设置为必填？
例如：
Property(t => t.DataQualityReview)
.If(t.IsDataQualityReview == true)
.ThenIsRequired()
答案 0 :(得分：0)
我认为数据库将无法实施这种约束。 您可以通过几种方法以不同的方式执行需求。
选项1 （首选）：
如果您可以更改数据库的架构，则可以创建一个单独的实体/表，该实体/表将表示def update_population(self,win_rate,population_size):
models = []
json_file = open('model_num.json', 'r')
loaded_model_json = json_file.read()
json_file.close()
loaded_model = model_from_json(loaded_model_json)
for counter in range(population_size):
loaded_model.load_weights('network' + str(counter) + '.h5')
models.append(loaded_model)
top_3_models = sorted(zip(win_rate, models), reverse=True)[:3]
top_models = []
for item in top_3_models:
top_models.append(item[1])
new_models = []
clone_counter = 3
for model in top_models:
new_models.append(model)
old_weights = []
for layer in model.layers:
old_weights.append(layer.get_weights())
for i in range(clone_counter):
new_model = clone_model(model)
new_weights = copy.copy(old_weights)
for weight in new_weights:
weight += normal(0,.1)
new_model.set_weights(new_weights)
new_models.append(new_model)
if clone_counter ==3:
clone_counter = 2
counter = 0
for model in new_models:
model.save('network' + str(counter) + '.h5')
counter +=1
。
DataQualityReview这里的想法是public class Foo
{
// optional DataQualityReview
public int? DataQualityReviewId { get; set; }
public DataQualityReview DataQualityReview { get; set; }
}
public class DataQualityReview
{
public int DataQualityReviewId { get; set; }
// required properties of a review
public string Comments { get; set; }
public int Rating { get; set; }
}
可能有Foo，也可能没有。如果确实有评论，则可以强制执行其他必需的属性（例如DataQualityReview，Comments等）。
选项2 ：如果无法更改数据库。您可以在类本身上强制执行此操作。
Rating如图所示，您无法在public class Foo
{
// notice `private set`
public bool IsDataQualityReview { get; private set; }
public string DataQualityReview { get; private set; }
public void UpdateReview(string review)
{
DataQualityReview = review;
IsDataQualityReview = review != null;
}
}
之外更改IsDataQualityReview和DataQualityReview。然后，您公开一个方法Foo，该方法会根据评论更改这两个属性。