dynamodb

example

const generateUpdateQueryExpression = (fields: Partial<TableStructure>) => {
    const exp = {
      UpdateExpression: "SET",
      ExpressionAttributeNames: {} as ObjectWithProperties,
      ExpressionAttributeValues: {} as ObjectWithProperties,
    };
    Object.entries(fields).forEach(([key, item]) => {
      const keyParts = key.split(".");
      const valueKey = keyParts[keyParts.length - 1];
      const attributeNames = `#${keyParts.join(".#")}`;

      exp.UpdateExpression += ` ${attributeNames} = :${valueKey},`;
      for (const name of keyParts) {
        exp.ExpressionAttributeNames[`#${name}`] = name;
      }
      exp.ExpressionAttributeValues[`:${valueKey}`] = marshall(item);
    });
    exp.UpdateExpression = exp.UpdateExpression.slice(0, -1);
    return exp;
  };