table.fields [in template “templatesentity.java.ftl“ at line 51, column 8]

table.fields [in template “templates/entity.java.ftl“ at line 51, column 8] 1： 一次代码生成器报错

"C:Program FilesJavajdk1.8.0_301binjava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2021.2libidea_rt.jar=65480:C:Program FilesJetBrainsIntelliJ IDEA 2021.2bin" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_301jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_301jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_301jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_301jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_301jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_301jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_301jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_301jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_301jrelibextnashorn.jar;C:Program FilesJavajdk1.8.0_301jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_301jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_301jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_301jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_301jrelibextzipfs.jar;C:Program 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en-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkspring-context5.3.3spring-context-5.3.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgcodehausgroovygroovy-all2.4.13groovy-all-2.4.13.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgapachecommonscommons-exec1.3commons-exec-1.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomgithubulisesbocchiojasypt-spring-boot2.1.0jasypt-spring-boot-2.1.0.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgjasyptjasypt1.9.2jasypt-1.9.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkbootspring-boot-actuator-autoconfigure2.4.2spring-boot-actuator-autoconfigure-2.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkbootspring-boot-actuator2.4.2spring-boot-actuator-2.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomfasterxmljacksondatatypejackson-datatype-jsr3102.11.4jackson-datatype-jsr310-2.11.4.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomibmicuicu4j67.1icu4j-67.1.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycnnhdccorenhdc-biz2.0.1nhdc-biz-2.0.1.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkcloudspring-cloud-starter-openfeign3.0.1spring-cloud-starter-openfeign-3.0.1.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkcloudspring-cloud-commons3.0.1spring-cloud-commons-3.0.1.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworksecurityspring-security-crypto5.4.2spring-security-crypto-5.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryiogithubopenfeignfeign-slf4j10.10.1feign-slf4j-10.10.1.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkbootspring-boot-starter-actuator2.4.2spring-boot-starter-actuator-2.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryiomicrometermicrometer-core1.6.3micrometer-core-1.6.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorghdrhistogramHdrHistogram2.1.12HdrHistogram-2.1.12.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorglatencyutilsLatencyUtils2.0.3LatencyUtils-2.0.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkbootspring-boot-starter-web2.4.2spring-boot-starter-web-2.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkbootspring-boot-starter-json2.4.2spring-boot-starter-json-2.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomfasterxmljacksondatatypejackson-datatype-jdk82.11.4jackson-datatype-jdk8-2.11.4.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomfasterxmljacksonmodulejackson-module-parameter-names2.11.4jackson-module-parameter-names-2.11.4.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkspring-web5.3.3spring-web-5.3.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkspring-beans5.3.3spring-beans-5.3.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkspring-webmvc5.3.3spring-webmvc-5.3.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkspring-expression5.3.3spring-expression-5.3.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkbootspring-boot-starter-undertow2.4.2spring-boot-starter-undertow-2.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryioundertowundertow-core2.2.3.Finalundertow-core-2.2.3.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgjbossxnioxnio-api3.8.0.Finalxnio-api-3.8.0.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgwildflycommonwildfly-common1.5.2.Finalwildfly-common-1.5.2.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgwildflyclientwildfly-client-config1.0.1.Finalwildfly-client-config-1.0.1.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgjbossxnioxnio-nio3.8.0.Finalxnio-nio-3.8.0.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgjbossthreadsjboss-threads3.1.0.Finaljboss-threads-3.1.0.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryioundertowundertow-servlet2.2.3.Finalundertow-servlet-2.2.3.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgjbossspecjavaxannotationjboss-annotations-api_1.3_spec2.0.1.Finaljboss-annotations-api_1.3_spec-2.0.1.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryioundertowundertow-websockets-jsr2.2.3.Finalundertow-websockets-jsr-2.2.3.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgjbossspecjavaxwebsocketjboss-websocket-api_1.1_spec2.0.0.Finaljboss-websocket-api_1.1_spec-2.0.0.Final.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryjakartaservletjakarta.servlet-api4.0.4jakarta.servlet-api-4.0.4.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgglassfishjakarta.el3.0.3jakarta.el-3.0.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkbootspring-boot-starter-logging2.4.2spring-boot-starter-logging-2.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorychqoslogbacklogback-classic1.2.3logback-classic-1.2.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgslf4jjul-to-slf4j1.7.30jul-to-slf4j-1.7.30.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryjoda-timejoda-time2.10.1joda-time-2.10.1.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorynetlogstashlogbacklogstash-logback-encoder4.11logstash-logback-encoder-4.11.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorychqoslogbacklogback-core1.2.3logback-core-1.2.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomfasterxmljacksoncorejackson-databind2.11.4jackson-databind-2.11.4.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomfasterxmljacksoncorejackson-annotations2.11.4jackson-annotations-2.11.4.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomfasterxmljacksoncorejackson-core2.11.4jackson-core-2.11.4.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomgithubdozermapperdozer-core6.4.1dozer-core-6.4.1.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycommons-beanutilscommons-beanutils1.9.3commons-beanutils-1.9.3.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycommons-collectionscommons-collections3.2.2commons-collections-3.2.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryjavaxxmlbindjaxb-api2.3.1jaxb-api-2.3.1.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryjavaxactivationjavax.activation-api1.2.0javax.activation-api-1.2.0.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgslf4jjcl-over-slf4j1.7.30jcl-over-slf4j-1.7.30.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgobjenesisobjenesis2.6objenesis-2.6.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkbootspring-boot-starter2.4.2spring-boot-starter-2.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgspringframeworkbootspring-boot2.4.2spring-boot-2.4.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryjakartaannotationjakarta.annotation-api1.3.5jakarta.annotation-api-1.3.5.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryorgyamlsnakeyaml1.27snakeyaml-1.27.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomctripframeworkapolloapollo-client1.1.2apollo-client-1.1.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomctripframeworkapolloapollo-core1.1.2apollo-core-1.1.2.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositorycomgoogleinjectguice4.1.0guice-4.1.0.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryjavaxinjectjavax.inject1javax.inject-1.jar;D:toolsapache-maven-3.8.2-binapache-maven-3.8.2repositoryaopallianceaopalliance1.0aopalliance-1.0.jar" cn.nhdc.cloud.cloud.config.GeneratorCodeConfig
11:19:04.498 [main] DEBUG com.baomidou.mybatisplus.generator.AutoGenerator - ==========================准备生成文件...==========================
十一月 11, 2021 11:19:05 上午 freemarker.log._JULLoggerFactory$JULLogger error
严重: Error executing FreeMarker template
FreeMarker template error:
The following has evaluated to null or missing:
==> table.fields  [in template "templates/entity.java.ftl" at line 51, column 8]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: #list table.fields as field  [in template "templates/entity.java.ftl" at line 51, column 1]
----

Java stack trace (for programmers):
----
freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...]
	at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)
	at freemarker.core.expression.assertNonNull(expression.java:233)
	at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:103)
	at freemarker.core.IteratorBlock.accept(IteratorBlock.java:93)
	at freemarker.core.Environment.visit(Environment.java:330)
	at freemarker.core.Environment.visit(Environment.java:336)
	at freemarker.core.Environment.process(Environment.java:309)
	at freemarker.template.Template.process(Template.java:384)
	at com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine.writer(FreemarkerTemplateEngine.java:52)
	at com.baomidou.mybatisplus.generator.engine.AbstractTemplateEngine.batchOutput(AbstractTemplateEngine.java:96)
	at com.baomidou.mybatisplus.generator.AutoGenerator.execute(AutoGenerator.java:102)
	at cn.nhdc.cloud.cloud.config.GeneratorCodeConfig.main(GeneratorCodeConfig.java:65)

11:19:05.844 [main] ERROR com.baomidou.mybatisplus.generator.engine.AbstractTemplateEngine - 无法创建文件，请检查配置信息！
freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> table.fields  [in template "templates/entity.java.ftl" at line 51, column 8]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: #list table.fields as field  [in template "templates/entity.java.ftl" at line 51, column 1]
----
	at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)
	at freemarker.core.expression.assertNonNull(expression.java:233)
	at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:103)
	at freemarker.core.IteratorBlock.accept(IteratorBlock.java:93)
	at freemarker.core.Environment.visit(Environment.java:330)
	at freemarker.core.Environment.visit(Environment.java:336)
	at freemarker.core.Environment.process(Environment.java:309)
	at freemarker.template.Template.process(Template.java:384)
	at com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine.writer(FreemarkerTemplateEngine.java:52)
	at com.baomidou.mybatisplus.generator.engine.AbstractTemplateEngine.batchOutput(AbstractTemplateEngine.java:96)
	at com.baomidou.mybatisplus.generator.AutoGenerator.execute(AutoGenerator.java:102)
	at cn.nhdc.cloud.cloud.config.GeneratorCodeConfig.main(GeneratorCodeConfig.java:65)
11:19:05.845 [main] DEBUG com.baomidou.mybatisplus.generator.AutoGenerator - ==========================文件生成完成！！！==========================

Process finished with exit code 0

2：原因总结：

代码生成器之前一直没有问题，突然产生这个错误的原因是将子类的字段全部抽取到父类，然后子类没有字段的原因，列表字段不能为空，贴上图

父类:

package cn.nhdc.common.database.entity;

import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableLogic;
import com.baomidou.mybatisplus.extension.activerecord.Model;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;

import java.io.Serializable;
import java.util.Date;


@Data
@EqualsAndHashCode(callSuper = true)
@Accessors(chain = true)
public abstract class baseEntity extends Model {

    
    @TableId
    @JsonSerialize(using = ToStringSerializer.class)
    private Long id;

    
    @TableField(value = "create_user", fill = FieldFill.INSERT)
    private String createUser;

    
    @TableField(value = "update_user", fill = FieldFill.UPDATE)
    private String updateUser;

    
    @TableField(value = "create_date", fill = FieldFill.INSERT)
    private Date createDate;

    
    @TableField(value = "update_date", fill = FieldFill.INSERT_UPDATE)
    private Date updateDate;

    
    @TableField("del_flag")
    @TableLogic(value = "0", delval = "1")
    private Boolean delFlag = Boolean.FALSE;


    @Override
    protected Serializable pkVal() {
        return id;
    }


}

子类：

package cn.nhdc.cloud.cloud.modules.home.model.entity;

import cn.nhdc.common.database.entity.baseEntity;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;


@Data
@EqualsAndHashCode(callSuper = true)
@Accessors(chain = true)
@TableName("personal_center_guide")
public class PersonalCenterGuide extends baseEntity {

    private static final long serialVersionUID = 1L;

}

3：解决方式

方式一：建一个父类不存在的字段即可
方式二： 配置文件中注释掉使用父类的字段   //strategy.setSuperEntityColumns("id","create_user","update_user","create_date","update_date","del_flag");