also use the existing file names as names of the newly created files. The file gets copied and the uri property gets populated with the destination file path. All the steps we did above were just for being able to refer to complete file source and destination paths during the process of copying files. The file_copy plugin simply copies the files from the file_source path to the file_dest path. Now, we use the file_source and file_dest paths generated above with plugin: file_copy. This is where we utilize the constants we defined in the source element. file_dest, in a similar way, is file_dest_uri.Using delimiter: / we tell the migrate module to join the two strings with a / (slash) in between to ensure we have a valid file name. file_source is obtained by concatenating the file_source_uri with the Image file column which stores the file's basename.Where do we use these constants? In the process element, we prepare two paths - the file source path ( file_source) and the file destination path ( file_dest). This is where all public files related to the site are stored. The public:// URI refers to the files directory inside the site in question. constants:įile_source_uri is used to refer to the path from which files are to be read during the import, and file_dest_uri is used to refer to the destination path where files should be copied to. The newly created file entities would refer to files stored in this directory. keys:Īpart from that, we use some constants to refer to source and destination paths for the images. This way, we would be refer to these files in other migrations using their names, eg, engineering.png. We re-use the file to import the files, so the source definition again uses the CSV plugin. We specify the key parameter in source as the column containing file names, ie, Image file. We create the file entities in the migrate_image.yml file, but this time, using some other process plugins. Then Drupal treats node-file associations as entity references, referring to the file entities with their IDs. This is because Drupal treats files as file entities which have their own ID. Step 1: Import images as "file" entitiesįirst we need to create file entities for each file. Though the problem might sound complex, the solution is as simple as following two steps. Coming soon: Migrating Media Items and Their Relationships.New: Migrating Hierarchical Taxonomy Terms.Part 3: Migrating Files and Images (you are here!).Part 2: Migrating Taxonomy Terms and Term References.□□ Get up to speed on Drupal 9! Watch Evolving Web and Pantheon's webinar on Drupal 9 migrations. You understand how to write multiple process plugins in migrations.You are able to write basic entity migrations.You have read the first part of this article series on migrating basic data.To make things easy, we have only one image per program. The base name of the images is mentioned in the CSV data source for academic programs. We have images for each academic program. * Implements hook_views_rss_channel_elements().Now that you've completed the migration of academic program nodes as mentioned in part 1 of this series and the migration of taxonomy terms as mentioned in part 2, this article focuses on the third requirement. In my case, it only takes two hook functions.
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