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Code Issues Releases Wiki Activity

Improve syntax of EXISTS filter, allow “value NOT EXISTS”

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This commit is contained in:
Loïc Lecrenier 2022-06-14 16:42:09 +02:00
parent 72452f0cb2
commit dc64170a69
4 changed files with 46 additions and 31 deletions
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45
filter-parser/src/lib.rs
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@ -3,23 +3,24 @@
//! ```text
//! filter = expression ~ EOF
//! expression = or
//! or = and (~ "OR" ~ and)
//! and = not (~ "AND" not)*
//! not = ("NOT" ~ not) | primary
//! primary = (WS* ~ "(" expression ")" ~ WS*) | geoRadius | condition | exist | to
//! or = and ("OR" and)
//! and = not ("AND" not)*
//! not = ("NOT" not) | primary
//! primary = (WS* "(" expression ")" WS*) | geoRadius | condition | exists | not_exists | to
//! condition = value ("==" | ">" ...) value
//! exist = value EXIST
//! exists = value EXISTS
//! not_exists = value NOT EXISTS
//! to = value value TO value
//! value = WS* ~ ( word | singleQuoted | doubleQuoted) ~ WS*
//! value = WS* ( word | singleQuoted | doubleQuoted) ~ WS*
//! singleQuoted = "'" .* all but quotes "'"
//! doubleQuoted = "\"" .* all but double quotes "\""
//! word = (alphanumeric | _ | - | .)+
//! geoRadius = WS* ~ "_geoRadius(" ~ WS* ~ float ~ WS* ~ "," ~ WS* ~ float ~ WS* ~ "," float ~ WS* ~ ")"
//! geoRadius = WS* ~ "_geoRadius(" WS* float WS* "," WS* float WS* "," float WS* ")"
//! ```
//!
//! Other BNF grammar used to handle some specific errors:
//! ```text
//! geoPoint = WS* ~ "_geoPoint(" ~ (float ~ ",")* ~ ")"
//! geoPoint = WS* "_geoPoint(" (float ",")* ")"
//! ```
//!
//! Specific errors:
@ -43,8 +44,8 @@ mod value;
use std::fmt::Debug;
use std::str::FromStr;
use condition::parse_exist;
pub use condition::{parse_condition, parse_to, Condition};
use condition::{parse_exists, parse_not_exists};
use error::{cut_with_err, NomErrorExt};
pub use error::{Error, ErrorKind};
use nom::branch::alt;
@ -250,7 +251,8 @@ fn parse_primary(input: Span) -> IResult<FilterCondition> {
),
parse_geo_radius,
parse_condition,
parse_exist,
parse_exists,
parse_not_exists,
parse_to,
// the next lines are only for error handling and are written at the end to have the less possible performance impact
parse_geo_point,
@ -424,17 +426,24 @@ pub mod tests {
},
),
(
"subscribers EXIST",
"subscribers EXISTS",
Fc::Condition {
fid: rtok("", "subscribers"),
op: Condition::Exist,
op: Condition::Exists,
},
),
(
"NOT subscribers EXIST",
"NOT subscribers EXISTS",
Fc::Condition {
fid: rtok("NOT ", "subscribers"),
op: Condition::NotExist,
op: Condition::NotExists,
},
),
(
"subscribers NOT EXISTS",
Fc::Condition {
fid: rtok("", "subscribers"),
op: Condition::NotExists,
},
),
(
@ -594,10 +603,10 @@ pub mod tests {
("channel = ", "Was expecting a value but instead got nothing."),
("channel = 🐻", "Was expecting a value but instead got `🐻`."),
("channel = 🐻 AND followers < 100", "Was expecting a value but instead got `🐻`."),
("OR", "Was expecting an operation `=`, `!=`, `>=`, `>`, `<=`, `<`, `TO`, `EXIST`, or `_geoRadius` at `OR`."),
("AND", "Was expecting an operation `=`, `!=`, `>=`, `>`, `<=`, `<`, `TO`, `EXIST`, or `_geoRadius` at `AND`."),
("channel Ponce", "Was expecting an operation `=`, `!=`, `>=`, `>`, `<=`, `<`, `TO`, `EXIST`, or `_geoRadius` at `channel Ponce`."),
("channel = Ponce OR", "Was expecting an operation `=`, `!=`, `>=`, `>`, `<=`, `<`, `TO`, `EXIST`, or `_geoRadius` but instead got nothing."),
("OR", "Was expecting an operation `=`, `!=`, `>=`, `>`, `<=`, `<`, `TO`, `EXISTS`, `NOT EXISTS`, or `_geoRadius` at `OR`."),
("AND", "Was expecting an operation `=`, `!=`, `>=`, `>`, `<=`, `<`, `TO`, `EXISTS`, `NOT EXISTS`, or `_geoRadius` at `AND`."),
("channel Ponce", "Was expecting an operation `=`, `!=`, `>=`, `>`, `<=`, `<`, `TO`, `EXISTS`, `NOT EXISTS`, or `_geoRadius` at `channel Ponce`."),
("channel = Ponce OR", "Was expecting an operation `=`, `!=`, `>=`, `>`, `<=`, `<`, `TO`, `EXISTS`, `NOT EXISTS`, or `_geoRadius` but instead got nothing."),
("_geoRadius", "The `_geoRadius` filter expects three arguments: `_geoRadius(latitude, longitude, radius)`."),
("_geoRadius = 12", "The `_geoRadius` filter expects three arguments: `_geoRadius(latitude, longitude, radius)`."),
("_geoPoint(12, 13, 14)", "`_geoPoint` is a reserved keyword and thus can't be used as a filter expression. Use the `_geoRadius(latitude, longitude, distance) built-in rule to filter on `_geo` coordinates."),