Optional. An expression which specifies a boost condition. The syntax and supported fields are the same as a filter expression. Examples: * * To boost documents with document ID "doc_1" or "doc_2", and color "Red" or "Blue": * * (id: ANY("doc_1", "doc_2")) AND (color: ANY("Red","Blue"))
↳ boost
float
Optional. Strength of the condition boost, which should be in [-1, 1]. Negative boost means demotion. Default is 0.0. Setting to 1.0 gives the document a big promotion. However, it does not necessarily mean that the boosted document will be the top result at all times, nor that other documents will be excluded. Results could still be shown even when none of them matches the condition. And results that are significantly more relevant to the search query can still trump your heavily favored but irrelevant documents. Setting to -1.0 gives the document a big demotion. However, results that are deeply relevant might still be shown. The document will have an upstream battle to get a fairly high ranking, but it is not blocked out completely. Setting to 0.0 means no boost applied. The boosting condition is ignored.
Optional. Complex specification for custom ranking based on customer defined attribute value.
getCondition
Optional. An expression which specifies a boost condition. The
syntax and supported fields are the same as a filter expression.
Examples:
To boost documents with document ID "doc_1" or "doc_2", and
color
"Red" or "Blue":
(id: ANY("doc_1", "doc_2")) AND (color: ANY("Red","Blue"))
Returns
Type
Description
string
setCondition
Optional. An expression which specifies a boost condition. The
syntax and supported fields are the same as a filter expression.
Examples:
To boost documents with document ID "doc_1" or "doc_2", and
color
"Red" or "Blue":
(id: ANY("doc_1", "doc_2")) AND (color: ANY("Red","Blue"))
Parameter
Name
Description
var
string
Returns
Type
Description
$this
getBoost
Optional. Strength of the condition boost, which should be in [-1,
1]. Negative boost means demotion. Default is 0.0.
Setting to 1.0 gives the document a big promotion. However, it does
not necessarily mean that the boosted document will be the top
result at all times, nor that other documents will be excluded.
Results could still be shown even when none of them matches the
condition. And results that are significantly more relevant to the
search query can still trump your heavily favored but irrelevant
documents.
Setting to -1.0 gives the document a big demotion. However, results
that are deeply relevant might still be shown. The document will
have an upstream battle to get a fairly high ranking, but it is not
blocked out completely.
Setting to 0.0 means no boost applied. The boosting condition is
ignored.
Returns
Type
Description
float
setBoost
Optional. Strength of the condition boost, which should be in [-1,
1]. Negative boost means demotion. Default is 0.0.
Setting to 1.0 gives the document a big promotion. However, it does
not necessarily mean that the boosted document will be the top
result at all times, nor that other documents will be excluded.
Results could still be shown even when none of them matches the
condition. And results that are significantly more relevant to the
search query can still trump your heavily favored but irrelevant
documents.
Setting to -1.0 gives the document a big demotion. However, results
that are deeply relevant might still be shown. The document will
have an upstream battle to get a fairly high ranking, but it is not
blocked out completely.
Setting to 0.0 means no boost applied. The boosting condition is
ignored.
Parameter
Name
Description
var
float
Returns
Type
Description
$this
getBoostControlSpec
Optional. Complex specification for custom ranking based on
customer defined attribute value.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Google Cloud Dialogflow V2 Client - Class ConditionBoostSpec (2.1.2)\n\nVersion latestkeyboard_arrow_down\n\n- [2.1.2 (latest)](/php/docs/reference/cloud-dialogflow/latest/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [2.1.1](/php/docs/reference/cloud-dialogflow/2.1.1/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [2.0.1](/php/docs/reference/cloud-dialogflow/2.0.1/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.17.2](/php/docs/reference/cloud-dialogflow/1.17.2/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.16.0](/php/docs/reference/cloud-dialogflow/1.16.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.15.1](/php/docs/reference/cloud-dialogflow/1.15.1/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.14.0](/php/docs/reference/cloud-dialogflow/1.14.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.13.0](/php/docs/reference/cloud-dialogflow/1.13.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.12.3](/php/docs/reference/cloud-dialogflow/1.12.3/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.11.0](/php/docs/reference/cloud-dialogflow/1.11.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.10.2](/php/docs/reference/cloud-dialogflow/1.10.2/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.9.0](/php/docs/reference/cloud-dialogflow/1.9.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.8.0](/php/docs/reference/cloud-dialogflow/1.8.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.7.2](/php/docs/reference/cloud-dialogflow/1.7.2/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.6.0](/php/docs/reference/cloud-dialogflow/1.6.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.5.0](/php/docs/reference/cloud-dialogflow/1.5.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.4.0](/php/docs/reference/cloud-dialogflow/1.4.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.3.2](/php/docs/reference/cloud-dialogflow/1.3.2/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.2.0](/php/docs/reference/cloud-dialogflow/1.2.0/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.1.1](/php/docs/reference/cloud-dialogflow/1.1.1/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec)\n- [1.0.1](/php/docs/reference/cloud-dialogflow/1.0.1/V2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec) \nReference documentation and code samples for the Google Cloud Dialogflow V2 Client class ConditionBoostSpec.\n\nBoost applies to documents which match a condition.\n\nGenerated from protobuf message `google.cloud.dialogflow.v2.SearchKnowledgeRequest.SearchConfig.BoostSpecs.BoostSpec.ConditionBoostSpec`\n\nNamespace\n---------\n\nGoogle \\\\ Cloud \\\\ Dialogflow \\\\ V2 \\\\ SearchKnowledgeRequest \\\\ SearchConfig \\\\ BoostSpecs \\\\ BoostSpec\n\nMethods\n-------\n\n### __construct\n\nConstructor.\n\n### getCondition\n\nOptional. An expression which specifies a boost condition. The\nsyntax and supported fields are the same as a filter expression.\n\nExamples:\n\n- To boost documents with document ID \"doc_1\" or \"doc_2\", and color \"Red\" or \"Blue\":\n - (id: ANY(\"doc_1\", \"doc_2\")) AND (color: ANY(\"Red\",\"Blue\"))\n\n### setCondition\n\nOptional. An expression which specifies a boost condition. The\nsyntax and supported fields are the same as a filter expression.\n\nExamples:\n\n- To boost documents with document ID \"doc_1\" or \"doc_2\", and color \"Red\" or \"Blue\":\n - (id: ANY(\"doc_1\", \"doc_2\")) AND (color: ANY(\"Red\",\"Blue\"))\n\n### getBoost\n\nOptional. Strength of the condition boost, which should be in \\[-1,\n1\\]. Negative boost means demotion. Default is 0.0.\n\nSetting to 1.0 gives the document a big promotion. However, it does\nnot necessarily mean that the boosted document will be the top\nresult at all times, nor that other documents will be excluded.\nResults could still be shown even when none of them matches the\ncondition. And results that are significantly more relevant to the\nsearch query can still trump your heavily favored but irrelevant\ndocuments.\nSetting to -1.0 gives the document a big demotion. However, results\nthat are deeply relevant might still be shown. The document will\nhave an upstream battle to get a fairly high ranking, but it is not\nblocked out completely.\nSetting to 0.0 means no boost applied. The boosting condition is\nignored.\n\n### setBoost\n\nOptional. Strength of the condition boost, which should be in \\[-1,\n1\\]. Negative boost means demotion. Default is 0.0.\n\nSetting to 1.0 gives the document a big promotion. However, it does\nnot necessarily mean that the boosted document will be the top\nresult at all times, nor that other documents will be excluded.\nResults could still be shown even when none of them matches the\ncondition. And results that are significantly more relevant to the\nsearch query can still trump your heavily favored but irrelevant\ndocuments.\nSetting to -1.0 gives the document a big demotion. However, results\nthat are deeply relevant might still be shown. The document will\nhave an upstream battle to get a fairly high ranking, but it is not\nblocked out completely.\nSetting to 0.0 means no boost applied. The boosting condition is\nignored.\n\n### getBoostControlSpec\n\nOptional. Complex specification for custom ranking based on\ncustomer defined attribute value.\n\n### hasBoostControlSpec\n\n### clearBoostControlSpec\n\n### setBoostControlSpec\n\nOptional. Complex specification for custom ranking based on\ncustomer defined attribute value."]]