csharp 通过...分组

Posted 2021-05-12

/* this avoids multiple policies with same endorsement numbers to be created */
var policies = _policyRepository.GetAll();

var q = from pol in policies
        where pol.Id == policy.Id
        let policyNo = pol.PolicyNo
        from p in policies
            where p.PolicyNo == policyNo
                    && p.Id != policy.Id
                    && p.ProposalStatus == ProposalStatus.Proposal
                    && p.EndorsementNo == policy.EndorsementNo
            group p by new
            {
                p.EndorsementNo,
                p.Id
            }
            into grouping
            select new
            {
                grouping.Key.Id
            };

var policiesToIgnore = q.ToListAsync().Result;

foreach (var policyToIgnore in policiesToIgnore)
{
    var policyToBePassive = await _policyRepository.GetAsync(policyToIgnore.Id);
    policyToBePassive.PolicyStatus = PolicyStatusEnum.Passive;
    await _policyRepository.UpdateAsync(policyToBePassive);
}