{"record":{"id":"b636f0252a668709","repo":"Automattic/mongoose","slug":"discriminator-name-can-only-be-a-discriminato","errorCode":null,"errorMessage":"Discriminator \"${name}\" can only be a discriminator of the root model","messagePattern":"Discriminator \"(.+?)\" can only be a discriminator of the root model","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"lib/helpers/model/discriminator.js","lineNumber":79,"sourceCode":"      }\n    }\n  }\n}\n\n/*!\n * ignore\n */\n\nmodule.exports = function discriminator(model, name, schema, tiedValue, applyPlugins, mergeHooks, overwriteExisting) {\n  if (!schema?.instanceOfSchema) {\n    throw new Error('You must pass a valid discriminator Schema');\n  }\n\n  mergeHooks = mergeHooks == null ? true : mergeHooks;\n\n  if (model.schema.discriminatorMapping &&\n      !model.schema.discriminatorMapping.isRoot) {\n    throw new Error('Discriminator \"' + name +\n        '\" can only be a discriminator of the root model');\n  }\n\n  if (applyPlugins) {\n    const applyPluginsToDiscriminators = get(model.base,\n      'options.applyPluginsToDiscriminators', false) || !mergeHooks;\n    // Even if `applyPluginsToDiscriminators` isn't set, we should still apply\n    // global plugins to schemas embedded in the discriminator schema (gh-7370)\n    model.base._applyPlugins(schema, {\n      skipTopLevel: !applyPluginsToDiscriminators\n    });\n  } else if (!mergeHooks) {\n    applyBuiltinPlugins(schema);\n  }\n\n  const key = model.schema.options.discriminatorKey;\n\n  const existingPath = model.schema.path(key);","sourceCodeStart":61,"sourceCodeEnd":97,"githubUrl":"https://github.com/Automattic/mongoose/blob/49cdab01366679723b487ecb754b38570f783289/lib/helpers/model/discriminator.js#L61-L97","documentation":"Error \"Discriminator \"${name}\" can only be a discriminator of the root model\" thrown in Automattic/mongoose.","triggerScenarios":"Thrown at lib/helpers/model/discriminator.js:79 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"49cdab01366679723b487ecb754b38570f783289","analyzedAt":"2026-08-21T22:54:00.882Z","schemaVersion":2},"datasetVersion":"2026-08-21T23:17:16.201Z"}