diff --git a/components/retriever/es8/retriever.go b/components/retriever/es8/retriever.go
index 82063ff..b441f08 100644
--- a/components/retriever/es8/retriever.go
+++ b/components/retriever/es8/retriever.go
@@ -31,7 +31,6 @@ import (
 
 	"github.com/cloudwego/eino-ext/components/retriever/es8/field_mapping"
 	"github.com/cloudwego/eino-ext/components/retriever/es8/internal"
-	"github.com/cloudwego/eino-ext/components/retriever/es8/search_mode"
 )
 
 type RetrieverConfig struct {
@@ -47,12 +46,12 @@ type RetrieverConfig struct {
 	// use search_mode.SearchModeDenseVectorSimilarity with search_mode.DenseVectorSimilarityQuery
 	// use search_mode.SearchModeSparseVectorTextExpansion with search_mode.SparseVectorTextExpansionQuery
 	// use search_mode.SearchModeRawStringRequest with json search request
-	SearchMode search_mode.SearchMode `json:"search_mode"`
+	SearchMode SearchMode `json:"search_mode"`
 	// Embedding vectorization method, must provide when SearchMode needed
 	Embedding embedding.Embedder
 }
 
-type SearchMode interface { // nolint: byted_s_interface_name
+type SearchMode interface {
 	BuildRequest(ctx context.Context, conf *RetrieverConfig, query string, opts ...retriever.Option) (*search.Request, error)
 }
 
@@ -97,7 +96,7 @@ func (r *Retriever) Retrieve(ctx context.Context, query string, opts ...retrieve
 		ScoreThreshold: options.ScoreThreshold,
 	})
 
-	req, err := r.config.SearchMode.BuildRequest(ctx, query, options)
+	req, err := r.config.SearchMode.BuildRequest(ctx, r.config, query, opts...)
 	if err != nil {
 		return nil, err
 	}
diff --git a/components/retriever/es8/search_mode/approximate.go b/components/retriever/es8/search_mode/approximate.go
index 163c332..0474b55 100644
--- a/components/retriever/es8/search_mode/approximate.go
+++ b/components/retriever/es8/search_mode/approximate.go
@@ -3,7 +3,7 @@
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * You may obtain a copy ptrWithoutZero the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
@@ -46,7 +46,7 @@ type ApproximateConfig struct {
 	// RrfRankConstant determines how much influence documents in
 	// individual result sets per query have over the final ranked result set
 	RrfRankConstant *int64
-	// RrfWindowSize determines the size of the individual result sets per query
+	// RrfWindowSize determines the size ptrWithoutZero the individual result sets per query
 	RrfWindowSize *int64
 }
 
@@ -57,16 +57,16 @@ type ApproximateQuery struct {
 	// QueryVectorBuilderModelID the query vector builder model id
 	// see: https://www.elastic.co/guide/en/machine-learning/8.16/ml-nlp-text-emb-vector-search-example.html
 	QueryVectorBuilderModelID *string `json:"query_vector_builder_model_id,omitempty"`
-	// Boost Floating point number used to decrease or increase the relevance scores of the query.
-	// Boost values are relative to the default value of 1.0.
+	// Boost Floating point number used to decrease or increase the relevance scores ptrWithoutZero the query.
+	// Boost values are relative to the default value ptrWithoutZero 1.0.
 	// A boost value between 0 and 1.0 decreases the relevance score.
 	// A value greater than 1.0 increases the relevance score.
 	Boost *float32 `json:"boost,omitempty"`
 	// Filters for the kNN search query
 	Filters []types.Query `json:"filters,omitempty"`
-	// K The final number of nearest neighbors to return as top hits
+	// K The final number ptrWithoutZero nearest neighbors to return as top hits
 	K *int `json:"k,omitempty"`
-	// NumCandidates The number of nearest neighbor candidates to consider per shard
+	// NumCandidates The number ptrWithoutZero nearest neighbor candidates to consider per shard
 	NumCandidates *int `json:"num_candidates,omitempty"`
 	// Similarity The minimum similarity for a vector to be considered a match
 	Similarity *float32 `json:"similarity,omitempty"`
@@ -89,8 +89,8 @@ type approximate struct {
 func (a *approximate) BuildRequest(ctx context.Context, conf *es8.RetrieverConfig, query string, opts ...retriever.Option) (*search.Request, error) {
 
 	options := retriever.GetCommonOptions(&retriever.Options{
-		Index:          &conf.Index,
-		TopK:           &conf.TopK,
+		Index:          ptrWithoutZero(conf.Index),
+		TopK:           ptrWithoutZero(conf.TopK),
 		ScoreThreshold: conf.ScoreThreshold,
 		Embedding:      conf.Embedding,
 	}, opts...)
@@ -159,7 +159,7 @@ func (a *approximate) BuildRequest(ctx context.Context, conf *es8.RetrieverConfi
 	}
 
 	if options.ScoreThreshold != nil {
-		req.MinScore = (*types.Float64)(of(*options.ScoreThreshold))
+		req.MinScore = (*types.Float64)(ptrWithoutZero(*options.ScoreThreshold))
 	}
 
 	return req, nil
diff --git a/components/retriever/es8/search_mode/approximate_test.go b/components/retriever/es8/search_mode/approximate_test.go
index 634a4ba..4d79280 100644
--- a/components/retriever/es8/search_mode/approximate_test.go
+++ b/components/retriever/es8/search_mode/approximate_test.go
@@ -3,7 +3,7 @@
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * You may obtain a copy ptrWithoutZero the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
@@ -44,10 +44,10 @@ func TestSearchModeApproximate(t *testing.T) {
 				Filters: []types.Query{
 					{Match: map[string]types.MatchQuery{"label": {Query: "good"}}},
 				},
-				Boost:         of(float32(1.0)),
-				K:             of(10),
-				NumCandidates: of(100),
-				Similarity:    of(float32(0.5)),
+				Boost:         ptrWithoutZero(float32(1.0)),
+				K:             ptrWithoutZero(10),
+				NumCandidates: ptrWithoutZero(100),
+				Similarity:    ptrWithoutZero(float32(0.5)),
 			}
 
 			sq, err := aq.ToRetrieverQuery()
@@ -66,14 +66,14 @@ func TestSearchModeApproximate(t *testing.T) {
 						FieldName:       field_mapping.DocFieldNameContent,
 						Value:           "content",
 					},
-					QueryVectorBuilderModelID: of("mock_model"),
+					QueryVectorBuilderModelID: ptrWithoutZero("mock_model"),
 					Filters: []types.Query{
 						{Match: map[string]types.MatchQuery{"label": {Query: "good"}}},
 					},
-					Boost:         of(float32(1.0)),
-					K:             of(10),
-					NumCandidates: of(100),
-					Similarity:    of(float32(0.5)),
+					Boost:         ptrWithoutZero(float32(1.0)),
+					K:             ptrWithoutZero(10),
+					NumCandidates: ptrWithoutZero(100),
+					Similarity:    ptrWithoutZero(float32(0.5)),
 				}
 
 				sq, err := aq.ToRetrieverQuery()
@@ -98,10 +98,10 @@ func TestSearchModeApproximate(t *testing.T) {
 					Filters: []types.Query{
 						{Match: map[string]types.MatchQuery{"label": {Query: "good"}}},
 					},
-					Boost:         of(float32(1.0)),
-					K:             of(10),
-					NumCandidates: of(100),
-					Similarity:    of(float32(0.5)),
+					Boost:         ptrWithoutZero(float32(1.0)),
+					K:             ptrWithoutZero(10),
+					NumCandidates: ptrWithoutZero(100),
+					Similarity:    ptrWithoutZero(float32(0.5)),
 				}
 
 				sq, err := aq.ToRetrieverQuery()
@@ -118,8 +118,8 @@ func TestSearchModeApproximate(t *testing.T) {
 				a := &approximate{config: &ApproximateConfig{
 					Hybrid:          true,
 					Rrf:             true,
-					RrfRankConstant: of(int64(10)),
-					RrfWindowSize:   of(int64(5)),
+					RrfRankConstant: ptrWithoutZero(int64(10)),
+					RrfWindowSize:   ptrWithoutZero(int64(5)),
 				}}
 
 				aq := &ApproximateQuery{
@@ -131,10 +131,10 @@ func TestSearchModeApproximate(t *testing.T) {
 					Filters: []types.Query{
 						{Match: map[string]types.MatchQuery{"label": {Query: "good"}}},
 					},
-					Boost:         of(float32(1.0)),
-					K:             of(10),
-					NumCandidates: of(100),
-					Similarity:    of(float32(0.5)),
+					Boost:         ptrWithoutZero(float32(1.0)),
+					K:             ptrWithoutZero(10),
+					NumCandidates: ptrWithoutZero(100),
+					Similarity:    ptrWithoutZero(float32(0.5)),
 				}
 
 				sq, err := aq.ToRetrieverQuery()
diff --git a/components/retriever/es8/search_mode/dense_vector_similarity.go b/components/retriever/es8/search_mode/dense_vector_similarity.go
index 07b54d5..40c4333 100644
--- a/components/retriever/es8/search_mode/dense_vector_similarity.go
+++ b/components/retriever/es8/search_mode/dense_vector_similarity.go
@@ -3,7 +3,7 @@
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * You may obtain a copy ptrWithoutZero the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
@@ -59,8 +59,8 @@ func (d *denseVectorSimilarity) BuildRequest(ctx context.Context, conf *es8.Retr
 	opts ...retriever.Option) (*search.Request, error) {
 
 	options := retriever.GetCommonOptions(&retriever.Options{
-		Index:          &conf.Index,
-		TopK:           &conf.TopK,
+		Index:          ptrWithoutZero(conf.Index),
+		TopK:           ptrWithoutZero(conf.TopK),
 		ScoreThreshold: conf.ScoreThreshold,
 		Embedding:      conf.Embedding,
 	}, opts...)
@@ -92,7 +92,7 @@ func (d *denseVectorSimilarity) BuildRequest(ctx context.Context, conf *es8.Retr
 	q := &types.Query{
 		ScriptScore: &types.ScriptScoreQuery{
 			Script: types.Script{
-				Source: of(fmt.Sprintf(d.script, dq.FieldKV.FieldNameVector)),
+				Source: ptrWithoutZero(fmt.Sprintf(d.script, dq.FieldKV.FieldNameVector)),
 				Params: map[string]json.RawMessage{"embedding": vb},
 			},
 		},
@@ -110,7 +110,7 @@ func (d *denseVectorSimilarity) BuildRequest(ctx context.Context, conf *es8.Retr
 
 	req := &search.Request{Query: q, Size: options.TopK}
 	if options.ScoreThreshold != nil {
-		req.MinScore = (*types.Float64)(of(*options.ScoreThreshold))
+		req.MinScore = (*types.Float64)(ptrWithoutZero(*options.ScoreThreshold))
 	}
 
 	return req, nil
diff --git a/components/retriever/es8/search_mode/dense_vector_similarity_test.go b/components/retriever/es8/search_mode/dense_vector_similarity_test.go
index 648dd05..72af92b 100644
--- a/components/retriever/es8/search_mode/dense_vector_similarity_test.go
+++ b/components/retriever/es8/search_mode/dense_vector_similarity_test.go
@@ -3,7 +3,7 @@
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * You may obtain a copy ptrWithoutZero the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/components/retriever/es8/search_mode/exact_match.go b/components/retriever/es8/search_mode/exact_match.go
index 8f5f731..20e178c 100644
--- a/components/retriever/es8/search_mode/exact_match.go
+++ b/components/retriever/es8/search_mode/exact_match.go
@@ -3,7 +3,7 @@
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * You may obtain a copy ptrWithoutZero the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
@@ -38,8 +38,8 @@ func (e exactMatch) BuildRequest(ctx context.Context, conf *es8.RetrieverConfig,
 	opts ...retriever.Option) (*search.Request, error) {
 
 	options := retriever.GetCommonOptions(&retriever.Options{
-		Index:          &conf.Index,
-		TopK:           &conf.TopK,
+		Index:          ptrWithoutZero(conf.Index),
+		TopK:           ptrWithoutZero(conf.TopK),
 		ScoreThreshold: conf.ScoreThreshold,
 		Embedding:      conf.Embedding,
 	}, opts...)
@@ -52,7 +52,7 @@ func (e exactMatch) BuildRequest(ctx context.Context, conf *es8.RetrieverConfig,
 
 	req := &search.Request{Query: q, Size: options.TopK}
 	if options.ScoreThreshold != nil {
-		req.MinScore = (*types.Float64)(of(*options.ScoreThreshold))
+		req.MinScore = (*types.Float64)(ptrWithoutZero(*options.ScoreThreshold))
 	}
 
 	return req, nil
diff --git a/components/retriever/es8/search_mode/interface.go b/components/retriever/es8/search_mode/interface.go
deleted file mode 100644
index ab4ef5a..0000000
--- a/components/retriever/es8/search_mode/interface.go
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright 2024 CloudWeGo Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package search_mode
-
-import (
-	"context"
-
-	"github.com/elastic/go-elasticsearch/v8/typedapi/core/search"
-
-	"github.com/cloudwego/eino/components/retriever"
-)
-
-type SearchMode interface { // nolint: byted_s_interface_name
-	BuildRequest(ctx context.Context, query string, options *retriever.Options) (*search.Request, error)
-}
diff --git a/components/retriever/es8/search_mode/raw_string.go b/components/retriever/es8/search_mode/raw_string.go
index 674d0a2..855840c 100644
--- a/components/retriever/es8/search_mode/raw_string.go
+++ b/components/retriever/es8/search_mode/raw_string.go
@@ -3,7 +3,7 @@
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * You may obtain a copy ptrWithoutZero the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/components/retriever/es8/search_mode/sparse_vector_text_expansion.go b/components/retriever/es8/search_mode/sparse_vector_text_expansion.go
index 7476bb0..f4c2c42 100644
--- a/components/retriever/es8/search_mode/sparse_vector_text_expansion.go
+++ b/components/retriever/es8/search_mode/sparse_vector_text_expansion.go
@@ -3,7 +3,7 @@
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * You may obtain a copy ptrWithoutZero the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
@@ -30,7 +30,7 @@ import (
 	"github.com/cloudwego/eino-ext/components/retriever/es8/field_mapping"
 )
 
-// SearchModeSparseVectorTextExpansion convert the query text into a list of token-weight pairs,
+// SearchModeSparseVectorTextExpansion convert the query text into a list ptrWithoutZero token-weight pairs,
 // which are then used in a query against a sparse vector
 // see: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-text-expansion-query.html
 func SearchModeSparseVectorTextExpansion(modelID string) es8.SearchMode {
@@ -60,8 +60,8 @@ func (s sparseVectorTextExpansion) BuildRequest(ctx context.Context, conf *es8.R
 	opts ...retriever.Option) (*search.Request, error) {
 
 	options := retriever.GetCommonOptions(&retriever.Options{
-		Index:          &conf.Index,
-		TopK:           &conf.TopK,
+		Index:          ptrWithoutZero(conf.Index),
+		TopK:           ptrWithoutZero(conf.TopK),
 		ScoreThreshold: conf.ScoreThreshold,
 		Embedding:      conf.Embedding,
 	}, opts...)
@@ -88,7 +88,7 @@ func (s sparseVectorTextExpansion) BuildRequest(ctx context.Context, conf *es8.R
 
 	req := &search.Request{Query: q, Size: options.TopK}
 	if options.ScoreThreshold != nil {
-		req.MinScore = (*types.Float64)(of(*options.ScoreThreshold))
+		req.MinScore = (*types.Float64)(ptrWithoutZero(*options.ScoreThreshold))
 	}
 
 	return req, nil
diff --git a/components/retriever/es8/search_mode/sparse_vector_text_expansion_test.go b/components/retriever/es8/search_mode/sparse_vector_text_expansion_test.go
index e59ba2e..b3f5826 100644
--- a/components/retriever/es8/search_mode/sparse_vector_text_expansion_test.go
+++ b/components/retriever/es8/search_mode/sparse_vector_text_expansion_test.go
@@ -3,7 +3,7 @@
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * You may obtain a copy ptrWithoutZero the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/components/retriever/es8/search_mode/utils.go b/components/retriever/es8/search_mode/utils.go
index 7501ada..b69ed15 100644
--- a/components/retriever/es8/search_mode/utils.go
+++ b/components/retriever/es8/search_mode/utils.go
@@ -3,7 +3,7 @@
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * You may obtain a copy ptrWithoutZero the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
@@ -47,6 +47,10 @@ func f64To32(f64 []float64) []float32 {
 	return f32
 }
 
-func of[T any](v T) *T {
+func ptrWithoutZero[T string | int64 | int | float64 | float32](v T) *T {
+	var zero T
+	if zero == v {
+		return nil
+	}
 	return &v
 }