详解mybatis collection标签一对多的使用

时间:2021-05-19

查询,结果集为AssociatedInfo:

<select id="queryReportAssociatedAcp" resultMap="AssociatedInfo"> SELECT r.requisition_number AS business_code, r.id AS header_id, r.document_type_id AS reportTypeId, r.applicant_id as employeeId FROM fec_expense.exp_report_payment_schedule b,fec_expense.exp_report_header r WHERE b.exp_report_header_id=r.id and r.`status`=1004 and b.frozen_flag ="Y" and r.applicant_id=#{applicationId} <if test="reportNumber!=null and reportNumber != ''"> AND r.requisition_number LIKE concat( '%', concat(#{reportNumber,jdbcType=VARCHAR}, '%')) </if> <if test="documentTypeId !=null and reportNumber != ''"> AND r.document_type_id = #{documentTypeId} </if> <if test="formTypes != null and formTypes.size > 0"> AND r.document_type_id IN <foreach collection="formTypes" item="formId" open="(" separator="," close=")"> #{formId} </foreach> </if> AND ( b.amount - ( SELECT COALESCE(sum( c.write_off_amount ), 0) AS write_off_amount FROM csh_write_off c WHERE c.document_header_id = b.exp_report_header_id AND c.document_line_id = b.id AND ( c.STATUS = 'Y' OR ( c.STATUS = 'P' AND c.operation_type = 'WRITE_OFF' ) ) ) - ( SELECT COALESCE(sum( a.amount ), 0) AS commit_amount FROM csh_data_relation_acp a WHERE a.report_head_id = b.exp_report_header_id AND a.report_line_id = b.id AND a.document_type = 'ACP_REQUISITION' ) > 0 ) GROUP BY r.requisition_number, b.exp_report_header_id, r.document_type_id, b.applicant_id ORDER BY r.requisition_number </select>

结果集 AssociatedInfo:使用collection实现1对多的场景,CashDataPublicReportHeaderDTO实体里包含一个行的集合List<CashDataPublicReportLineDTO> lines:

<resultMap id="AssociatedInfo" type="com.hand.hcf.app.payment.web.dto.CashDataPublicReportHeaderDTO"> <result column="header_id" property="reportHeadId"/> <result column="business_code" property="reportNumber"/> <result column="form_name" property="reportTypeName"/> <collection property="lineList" column="{headerId=header_id}" ofType="ArrayList" select="getPaymentInfo"/> </resultMap> <select id="getPaymentInfo" resultType="com.hand.hcf.app.payment.web.dto.CashDataPublicReportLineDTO"> SELECT temp.id scheduleLineId, "" AS cshTransactionId, temp.amount, temp.associated_amount associatedAmount, ( temp.amount - temp.associated_amount - (SELECT COALESCE ( sum( c.write_off_amount ), 0 ) AS write_off_amountFROM csh_write_off cWHERE c.document_header_id = temp.exp_report_header_id AND c.document_line_id = temp.id AND c.document_type = "PUBLIC_REPORT" AND ( c.STATUS = 'Y' OR ( c.STATUS = 'P' AND c.operation_type = 'WRITE_OFF' ) ) ) ) AS availableAmount, temp.exp_report_header_id expReportHeaderId, 0 AS scheduleLineNumber, temp.company_id companyId, temp.currency_code currency, temp.description description, temp.exchange_rate exchangeRate, temp.payment_schedule_date schedulePaymentDate, temp.payment_method paymentMethod, temp.payment_type, temp.prop_flag prop_flag, temp.csh_transaction_class_id cshTransactionClassId, ( SELECT ctc.description FROM csh_transaction_class ctc WHERE ctc.id = temp.csh_transaction_class_id ) AS cshTransactionClassName, temp.cash_flow_item_id cashFlowItemId, temp.payee_category payeeCategory, temp.payee_id payeeId, temp.account_number accountNumber, temp.account_name accountName, temp.bank_code bankCode, temp.bank_name bankName, temp.bank_code bankLocationCode, temp.bank_name bankLocationName, "" provinceCode, "" provinceName, ""cityCode, "" cityName, (select c.type_code from csh_transaction_class c where c.id=temp.csh_transaction_class_id ) cshTransactionTypeCode, ""contractHeaderIdFROM (SELECT b.*, (SELECT COALESCE ( sum( a.amount ), 0 ) AS associated_amountFROM csh_data_relation_acp aWHERE a.report_head_id = b.exp_report_header_id AND a.report_line_id = b.id AND a.document_type = 'ACP_REQUISITION' ) AS associated_amountFROM fec_expense.exp_report_payment_schedule b ,fec_expense.exp_report_header rWHERE b.frozen_flag = "Y" and b.exp_report_header_id=r.id AND b.exp_report_header_id = #{headerId} ) temp </select>

包含列表的实体类CashDataPublicReportHeaderDTO :

package com.hand.hcf.app.payment.web.dto; import com.fasterxml.jackson.databind.annotation.JsonSerialize;import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;import lombok.Data; import java.time.ZonedDateTime;import java.util.List; @Datapublic class CashDataPublicReportHeaderDTO { @JsonSerialize(using = ToStringSerializer.class) private Long reportHeadId;//报账单头ID private String reportNumber;//报账单编号 private String reportTypeName;//报账单类型 @JsonSerialize(using = ToStringSerializer.class) private Long reportTypeId;// 报账单类型ID private List<CashDataPublicReportLineDTO> lineList;//报账单计划付款行 @JsonSerialize(using = ToStringSerializer.class) private Long employeeId;//员工ID private String employeeName;//员工名称 private ZonedDateTime requisitionDate; // 申请日期}

总结

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