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这是我用来创建必要类的 sql 脚本：

CREATE CLASS ProductSummary;
CREATE PROPERTY ProductSummary.name STRING (NOTNULL, MANDATORY TRUE);
CREATE PROPERTY ProductSummary.modelNumber LONG (NOTNULL, MANDATORY TRUE);
ALTER CLASS ProductSummary STRICTMODE TRUE;
 
CREATE CLASS PricingSummary;
CREATE PROPERTY PricingSummary.price LONG (NOTNULL, MANDATORY TRUE);
CREATE PROPERTY PricingSummary.discount LONG (NOTNULL, MANDATORY TRUE);
ALTER CLASS PricingSummary STRICTMODE TRUE;
 
CREATE CLASS TotalSummary EXTENDS V;
CREATE PROPERTY TotalSummary.projectLink LINK Project (NOTNULL, MANDATORY TRUE);
CREATE PROPERTY TotalSummary.productSummaries EMBEDDEDLIST ProductSummary;
CREATE PROPERTY TotalSummary.pricingSummaries EMBEDDEDLIST PricingSummary;
ALTER CLASS TotalSummary STRICTMODE TRUE;
CREATE INDEX TotalSummary_projectLink_idx ON TotalSummary (projectLink) UNIQUE;

我正在尝试将一些值插入到我的 TotalSummary 类中，我还需要在 EmbeddedList 中插入一些值以用于定价摘要和产品摘要。

public TotalSummary create(final TotalSummary totalSummary) {
        final Long projectId = 1;
        final StatementBuilder builder = new StatementBuilder();
        final StringBuilder query = new StringBuilder();
        
        final List<Map<?, ?>> productSummaries = totalSummary.getProductSummaries().stream()
                .map(ProductSummary::toMap)
                .collect(Collectors.toList());
        
        final List<Map<?, ?>> pricingSummaries = totalSummary.getPricingSummaries().stream()
                .map(PricingSummary::toMap)
                .collect(Collectors.toList());
        
        
        builder.addAttribute("projectLink = (SELECT FROM project WHERE id = ?)", projectId);
        if ( ! productSummaries.isEmpty()) {
            builder.addAttribute("productSummaries = ?", productSummaries);
        }
        if ( ! pricingSummaries.isEmpty()) {
            builder.addAttribute("pricingSummaries = ?", pricingSummaries);
        }
        
        try {
            insert(TotalSummary.class.getSimpleName(), builder.attributes(), statement -> {
                builder.init(statement);
                return statement;
            });
        } catch (final UncategorizedSQLException e) {
            throw new ConstraintViolationException(totalSummary, ExceptionUtils.getRootCauseMessage(e), e);
        }

        return assertNotNull(findById(projectId));
    }

This is the utility method that I am using to build the insert query : 
protected String insert(final String vertex, final String fieldValuePairs, final PreparedStatementInitializer initializer) {
    final String sql = "INSERT INTO " + vertex + " SET " + fieldValuePairs + " RETURN @rid";
    return executeStatement(sql, initializer);
}

The toMap methods to convert the List<ProductSummary> to List<Map<?,?>>

**ProductSummary**  
public Map<String, Object> toMap() {
    final Map<String, Object> ret = new HashMap<>();
    ret.put("name", name);
    ret.put("model number", Long.valueOf(modelNumber));
    return ret;
}

The toMap methods to convert the List<PricingSummary> to List<Map<?,?>>
**PricingSummary**
public Map<String, Object> toMap() {
    final Map<String, Object> ret = new HashMap<>();
    ret.put("price", Long.valueOf(price));
    ret.put("discount", Long.valueOf(discount));
    return ret;
}

执行代码时出现以下异常

Constraint violation for: TotalSummary@58f79eeb[recordId=<null>,customProperties=[]]. Reason: OValidationException: The field 'TotalSummary.productSummaries' has been declared as EMBEDDEDLIST but an incompatible type is used.

我已经尝试过的事情：

  1. 在将其添加到构建器之前，我曾尝试将其转换为 json 格式，例如 new Gson().toJson(pricingSummaries);
  2. 将pricingSummaries 和productSummaries 转换为Array()。
4

1 回答 1

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您将摘要定义为，EMBEDDEDLIST ProductSummary但您将地图列表作为值传递。

尝试创建真实的ProductSummary对象，例如。

OElement ret = db.newEmbeddedElement("ProductSummary");
ret.setProperty("price", Long.valueOf(price));
ret.setProperty("discount", Long.valueOf(discount));
于 2020-10-19T07:26:18.820 回答