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Using Filters

Filters can be used on select(), update(), and delete() queries.

If a Postgres function returns a table response, you can also apply filters.

Applying Filters

You must apply your filters to the end of your query. For example:

const { data, error } = await supabase
.from('cities')
.select('name, country_id')
.eq('name', 'The Shire') // Correct

const { data, error } = await supabase
.from('cities')
.eq('name', 'The Shire') // Incorrect
.select('name, country_id')

Chaining

Filters can be chained together to produce advanced queries. For example:

const { data, error } = await supabase
.from('cities')
.select('name, country_id')
.gte('population', 1000)
.lt('population', 10000)

Conditional Chaining

Filters can be built up one step at a time and then executed. For example:

const filterByName = null
const filterPopLow = 1000
const filterPopHigh = 10000

let query = supabase
.from('cities')
.select('name, country_id')

if (filterByName) { query = query.eq('name', filterByName) }
if (filterPopLow) { query = query.gte('population', filterPopLow) }
if (filterPopHigh) { query = query.lt('population', filterPopHigh) }

const { data, error } = await query