How to support auto generate slug from title field in collections

Stupidism

10 months ago

3 4

• Selected Answer
  

  Stupidism

  8 months ago

  A better solution for slug is to add a custom element:

  // Articles:
  
  fields: [
    // ...
    slug({ trackingField: 'title' }),
    // ...
  ]
  
  // fields/slug.ts
  
  import { Field } from 'payload/types';
  import { merge } from 'lodash';
  
  import { getSlugInput } from './ui/SlugInput';
  
  type Slug = (
    options?: { trackingField?: string },
    overrides?: Partial<Field>
  ) => Field;
  
  // By dynamically building fields in code configurations are reusable and concise
  export const slug: Slug = ({ trackingField = 'title' } = {}, overrides) =>
    merge<Field, Partial<Field> | undefined>(
      {
        name: 'slug',
        unique: true,
        type: 'text',
        admin: {
          position: 'sidebar',
          components: {
            Field: getSlugInput({ trackingField })
          }
        },
      },
      overrides
    );
  
  // SlugInput.tsx
  import { kebabCase } from 'lodash';
  import { TextInput, useField, useWatchForm } from 'payload/components/forms';
  import { useEffect, useRef } from 'react';
  
  export const getSlugInput = ({ trackingField }: { trackingField: string }) => () => {
    const { getDataByPath } = useWatchForm();
    const { value: slugValue = '', setValue: setSlugValue } = useField<string>({ path: 'slug' });
    const trackingFieldValue = getDataByPath<string>(trackingField) || '';
    const prevTrackingFieldValueRef = useRef(trackingFieldValue);
    const stopTrackingRef = useRef(false);
  
    useEffect(() => {
      if (!trackingField || stopTrackingRef.current) {
        return;
      }
      if (trackingFieldValue === prevTrackingFieldValueRef.current) {
        return;
      }
      const prevSlugValue = kebabCase(prevTrackingFieldValueRef.current);
      prevTrackingFieldValueRef.current = trackingFieldValue;
      if (prevSlugValue !== slugValue) {
        return;
      }
      setSlugValue(kebabCase(trackingFieldValue));
    }, [trackingFieldValue]);
  
    return (
      <div>
        <TextInput
          name="slug"
          path="slug"
          label="Slug"
          description={slugValue ? `Auto generated based on ${trackingField}` : `Will be auto-generated from ${trackingField} when save`}
          value={slugValue}
          onChange={e => {
            setSlugValue(e.target.value);
            stopTrackingRef.current = true;
          }}
        />
      </div>
    );
  }
  
  

• 

  GeorgeyB

  10 months ago

  I've done a similar thing. I used the beforeChange hook.

  Given the following creator function:

  function generateSlugFrom(titleField: string, slugField = 'slug'): BeforeChangeHook<Product> {
      return ({ data }) => {
          if (!(titleField in data)) {
              return data;
          }
  
          return {
              ...data,
              [slugField]: slugify(data[titleField])
          };
      };
  }
  

  I use it like so:

  const Products: CollectionConfig = {
      slug: 'products',
      hooks: {
          beforeChange: [generateSlugFrom('name')]
      },
      fields: [
          {
              name: 'name',
              label: 'Name',
              type: 'text'
          },
          {
              name: 'slug',
              label: 'Slug',
              type: 'text'
          },
      ]
  };
  

  With help of course, from slugify.

  1 reply
  

  Stupidism

  10 months ago

  Great, that's exactly what I want.

• 

  Stupidism

  9 months ago

  Another implementation from the public demo: https://github.com/payloadcms/public-demo/blob/master/src/fields/slug.ts

• 

  MinSomai

  9 months ago

  what is the use case for this slug? I can't seem to wrap my head around because we can query with document id only.

  4 replies
  

  Stupidism

  9 months ago

  It's more like auto-generate slug before writing to database.
  Are you looking for sth-like slug updates in UI while inputting for name/title?

  

  MinSomai

  9 months ago

  slug is generated fine. I want to use this slug to query document.

  

  jmikrut

  Payload Team

  9 months ago

  Hey @MinSomai — you can totally query via the slug field.

  In REST, it'd be ?where[slug][equals]=slug-here or similar.

  For more, including how to query in GraphQL and the Local API, take a look at the documentation for querying here.

  

  MinSomai

  9 months ago

  I'm dumb. totally makes sense now, thanks.