Elements such as page links and images need to preserve metadata such as the page or image ID, which is not present in the final HTML representation.Enforcing a subset of HTML helps to keep presentational markup out of the database, making the site more maintainable, and making it easier to repurpose site content (including, potentially, producing non-HTML output such as LaTeX).Rich text fields can specify a features argument to further restrict the elements permitted in the field - see Limiting features in a rich text field.The editor interface needs to filter out certain kinds of unwanted markup this includes malicious scripting, font styles pasted from an external word processor, and elements which would break the validity or consistency of the site design (for example, pages will generally reserve the element for the page title, and so it would be inappropriate to allow users to insert their own additional elements through rich text).In reality, it’s necessary to give editors a representation of rich text content that is several steps removed from the final HTML output, for several reasons: Managing documents, images, snippets and collectionsĪt first glance, Wagtail’s rich text capabilities appear to give editors direct control over a block of HTML content.Copying and creating aliases to existing pages.Previewing and submitting pages for moderation.Inserting links to documents into body text.Customising CreateView, EditView and DeleteView.Customising IndexView - the listing view.Customising the user account settings form.How to use a redirect with Form builder to prevent double submission.
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It is composed of a highly viscous nucleus pulposus surrounded by a thick fibrocartilage outer ring, annulus fibrosus, and sandwiched by cartilage endplates below and above (Fig. The intervertebral disc is a complex cartilage structure whose function is to resist biomechanical loading during spinal movement. In this comment, we will discuss the key issues mentioned above in disc cell therapy. In addition, there are still other considerable challenges in the entire translational spectrum of cell therapy, including the lack of guidelines for disease classification and patient stratification, as well as a marked lack of understanding of the characteristics of neural distribution, cell fate, and long-term prospects for disc regeneration in the context of cell therapy. This situation establishes an adverse microenvironment for resident cells and delivered exogenous cells, which limits the effect of cell therapy 4, 5. However, due to its distinctive structure and function, disc presents unique characteristics: largely avascular, hypoxia, low pH, high osmotic pressure and high mechanical load 4, 6, 7. For this reason, regenerative medicine, the repair of degenerate discs by intradiscal injection of exogenous cells, is emerging as a promising approach 4. So far, neither conservative treatment nor surgical treatment can prevent or at least slow down the degenerative process 4, 5. Although the specific cause of low back pain is rarely determined, lumbar intervertebral disc degeneration is considered to be the main cause of low back pain 3. Low back pain is a very common symptom in people all over the world, which is now the leading cause of disability worldwide 1, 2. |
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