nodejs某一个表读取失败（查询到的是“[]”），其他表可以查询

Question

module.exports = function(app) {
const mongoose = app.mongoose;
const RegionsSchema = new mongoose.Schema({
REGION_ID: { type: Number },
REGION_CODE: { type: String },
REGION_NAME: { type: String },
PARENT_ID: { type: Number },
REGION_LEVEL: { type: Number },
REGION_ORDER: { type: Number },
REGION_NAME_EN: { type: String },
REGION_SHORTNAME_EN: { type: String }
});

return mongoose.model("Region", RegionsSchema);

}