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McRule
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Fixed null bug.

sean-m-patch-1
Sean McArde 2023-09-02 10:00:17 -07:00 committed by Sean McArdle
parent c65aba2048
commit 7be468895d
2 changed files with 24 additions and 4 deletions
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2
McRule/ExpressionRule.cs
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@ -14,7 +14,7 @@ namespace McRule {
public ExpressionRuleCollection() { }
public Expression<Func<T, bool>>? GetPredicateExpression<T>() {
var expressions = Rules.Select(x => x.GetPredicateExpression<T>());
var expressions = Rules.Select(x => x.GetPredicateExpression<T>()).Where(x => x != null);
return (RuleOperator == PredicateExpressionPolicyExtensions.RuleOperator.Or)
? PredicateExpressionPolicyExtensions.CombineOr<T>(expressions)

26
RulerDev/Program.cs
View File

@ -34,7 +34,7 @@ var filterPolicy = new ExpressionPolicy
},
RuleOperator = PredicateExpressionPolicyExtensions.RuleOperator.Or
};
var filterExpression = filterPolicy.GetPredicateExpression<User>();
Expression<Func<User,bool>>? filterExpression = filterPolicy.GetPredicateExpression<User>();
filterPolicy.Dump(filterPolicy.Name);
users.Where(filterExpression).Dump($"{filterPolicy.Name} operator {filterPolicy.RuleOperator}");
@ -92,13 +92,33 @@ var thePolicy = new ExpressionPolicy {
}
};
var filter = thePolicy.GetExpression<Thing>();
var filter = thePolicy.GetPredicateExpression<Thing>();
filter.Dump();
new[] { new Thing("Sean", "Confused"), new Thing("Tim", "Enchantor") }.Where(filter.Compile()).Dump();
public record Thing(string name, string kind, string[] tags = null);
record User(string first, string last, string workPhone, string homePhone, string workAddress, string agency, string[] tags = null);
public class User
{
public string first { get; init; }
public string last { get; init; }
public string workPhone { get; init; }
public string homePhone { get; init; }
public string workAddress { get; init; }
public string agency { get; init; }
public string[] tags { get; init; }
public User(string first, string last, string workPhone, string homePhone, string workAddress, string agency, string[] tags = null)
{
this.first = first;
this.last = last;
this.workPhone = workPhone;
this.homePhone = homePhone;
this.workAddress = workAddress;
this.agency = agency;
this.tags = tags ?? new string[0];
}
}