diff --git a/cli/src/main.rs b/cli/src/main.rs
index b84ff3243..cae4d081f 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -262,7 +262,7 @@ impl Search {
         }
 
         if let Some(ref filter) = self.filter {
-            let condition = milli::FilterCondition::from_str(&txn, &index, filter)?;
+            let condition = milli::Filter::from_str(filter)?;
             search.filter(condition);
         }
 
diff --git a/http-ui/src/main.rs b/http-ui/src/main.rs
index d27c6d5bb..e3f8f0317 100644
--- a/http-ui/src/main.rs
+++ b/http-ui/src/main.rs
@@ -24,7 +24,8 @@ use milli::documents::DocumentBatchReader;
 use milli::update::UpdateIndexingStep::*;
 use milli::update::{IndexDocumentsMethod, Setting, UpdateBuilder};
 use milli::{
-    obkv_to_json, CompressionType, FilterCondition, Index, MatchingWords, SearchResult, SortError,
+    obkv_to_json, CompressionType, Filter as MilliFilter, FilterCondition, Index, MatchingWords,
+    SearchResult, SortError,
 };
 use once_cell::sync::OnceCell;
 use rayon::ThreadPool;
@@ -739,7 +740,7 @@ async fn main() -> anyhow::Result<()> {
 
             let filters = match query.filters {
                 Some(condition) if !condition.trim().is_empty() => {
-                    Some(FilterCondition::from_str(&rtxn, &index, &condition).unwrap())
+                    Some(MilliFilter::from_str(&condition).unwrap())
                 }
                 _otherwise => None,
             };
@@ -747,7 +748,7 @@ async fn main() -> anyhow::Result<()> {
             let facet_filters = match query.facet_filters {
                 Some(array) => {
                     let eithers = array.into_iter().map(Into::into);
-                    FilterCondition::from_array(&rtxn, &index, eithers).unwrap()
+                    MilliFilter::from_array(eithers).unwrap()
                 }
                 _otherwise => None,
             };
diff --git a/milli/src/facet/mod.rs b/milli/src/facet/mod.rs
index 274d2588d..aaa7a65ce 100644
--- a/milli/src/facet/mod.rs
+++ b/milli/src/facet/mod.rs
@@ -2,5 +2,7 @@ mod facet_type;
 mod facet_value;
 pub mod value_encoding;
 
+pub use filter_parser::{Condition, FilterCondition, FilterParserError, Span, Token};
+
 pub use self::facet_type::FacetType;
 pub use self::facet_value::FacetValue;
diff --git a/milli/src/lib.rs b/milli/src/lib.rs
index 27453bf36..e2ecb060c 100644
--- a/milli/src/lib.rs
+++ b/milli/src/lib.rs
@@ -34,7 +34,9 @@ pub use self::heed_codec::{
     RoaringBitmapLenCodec, StrBEU32Codec, StrStrU8Codec,
 };
 pub use self::index::Index;
-pub use self::search::{FacetDistribution, Filter, MatchingWords, Search, SearchResult};
+pub use self::search::{
+    Condition, FacetDistribution, Filter, FilterCondition, MatchingWords, Search, SearchResult,
+};
 
 pub type Result<T> = std::result::Result<T, error::Error>;
 
diff --git a/milli/src/search/facet/filter_condition.rs b/milli/src/search/facet/filter_condition.rs
index 2ba5a023e..29be3edf4 100644
--- a/milli/src/search/facet/filter_condition.rs
+++ b/milli/src/search/facet/filter_condition.rs
@@ -3,7 +3,7 @@ use std::ops::Bound::{self, Excluded, Included};
 use std::str::FromStr;
 
 use either::Either;
-use filter_parser::{Condition, FilterCondition, FilterParserError, Span, Token};
+pub use filter_parser::{Condition, FilterCondition, FilterParserError, Span, Token};
 use heed::types::DecodeIgnore;
 use log::debug;
 use nom::error::{ErrorKind, VerboseError};
@@ -209,7 +209,7 @@ impl<'a> Filter<'a> {
         // Make sure we always bound the ranges with the field id and the level,
         // as the facets values are all in the same database and prefixed by the
         // field id and the level.
-        // TODO TAMO: return good error when we can't parse a span
+
         let (left, right) = match operator {
             Condition::GreaterThan(val) => (Excluded(parse(val)?), Included(f64::MAX)),
             Condition::GreaterThanOrEqual(val) => (Included(parse(val)?), Included(f64::MAX)),
@@ -315,10 +315,15 @@ impl<'a> Filter<'a> {
 
         match &self.condition {
             FilterCondition::Condition { fid, op } => {
-                // TODO: parse fid
-                let _ = fid;
-                let fid = 42;
-                Self::evaluate_operator(rtxn, index, numbers_db, strings_db, fid, &op)
+                let filterable_fields = index.fields_ids_map(rtxn)?;
+                if let Some(fid) = filterable_fields.id(fid.inner) {
+                    Self::evaluate_operator(rtxn, index, numbers_db, strings_db, fid, &op)
+                } else {
+                    // TODO TAMO: update the error message
+                    return Err(UserError::InvalidFilter {
+                        input: format!("Bad filter, available filters are {:?}", filterable_fields),
+                    })?;
+                }
             }
             FilterCondition::Or(lhs, rhs) => {
                 let lhs = Self::evaluate(&(lhs.as_ref().clone()).into(), rtxn, index)?;
diff --git a/milli/src/search/facet/mod.rs b/milli/src/search/facet/mod.rs
index d6f276fbb..c0b692de7 100644
--- a/milli/src/search/facet/mod.rs
+++ b/milli/src/search/facet/mod.rs
@@ -1,3 +1,5 @@
+pub use filter_parser::{Condition, FilterCondition};
+
 pub use self::facet_distribution::FacetDistribution;
 pub use self::facet_number::{FacetNumberIter, FacetNumberRange, FacetNumberRevRange};
 pub use self::facet_string::FacetStringIter;
diff --git a/milli/src/search/mod.rs b/milli/src/search/mod.rs
index a31ead1ec..f52dd06f0 100644
--- a/milli/src/search/mod.rs
+++ b/milli/src/search/mod.rs
@@ -14,7 +14,7 @@ use meilisearch_tokenizer::{Analyzer, AnalyzerConfig};
 use once_cell::sync::Lazy;
 use roaring::bitmap::RoaringBitmap;
 
-pub use self::facet::{FacetDistribution, FacetNumberIter, Filter};
+pub use self::facet::{Condition, FacetDistribution, FacetNumberIter, Filter, FilterCondition};
 pub use self::matching_words::MatchingWords;
 use self::query_tree::QueryTreeBuilder;
 use crate::error::UserError;